diff --git a/.eslintrc.yml b/.eslintrc.yml
index b47ddca1a3..300a48ef67 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -3,13 +3,12 @@ extends:
   - semistandard
   - plugin:prettier/recommended
 env:
-  node: yes
-  browser: yes
+  node: true
+  browser: true
 parserOptions:
   ecmaVersion: 5
   ecmaFeatures:
-    globalReturn: no
-    jsx: no
+    jsx: false
   sourceType: script
 rules:
   strict:
@@ -31,14 +30,14 @@ overrides:
     parserOptions:
       ecmaVersion: 2017
     env:
-      browser: no
+      browser: false
 
   - files:
       - test/**/*.{js,mjs}
     env:
-      mocha: yes
+      mocha: true
     globals:
-      expect: no
+      expect: readonly
   - files:
       - bin/*
       - lib/**/*.js
diff --git a/browser-entry.js b/browser-entry.js
index fd89117755..3f770fac49 100644
--- a/browser-entry.js
+++ b/browser-entry.js
@@ -129,7 +129,7 @@ mocha.setup = function(opts) {
     opts = {ui: opts};
   }
   for (var opt in opts) {
-    if (opts.hasOwnProperty(opt)) {
+    if (Object.prototype.hasOwnProperty.call(opts, opt)) {
       this[opt](opts[opt]);
     }
   }
diff --git a/package-lock.json b/package-lock.json
index 01eed437ec..05f0471347 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -801,13 +801,79 @@
       "dev": true
     },
     "array-includes": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/array-includes/-/array-includes-3.0.3.tgz",
-      "integrity": "sha1-GEtI9i2S10UrsxsyMWXH+L0CJm0=",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/array-includes/-/array-includes-3.1.1.tgz",
+      "integrity": "sha512-c2VXaCHl7zPsvpkFsw4nxvFie4fh1ur9bpcgsVkIjqn0H/Xwdg+7fv3n2r/isyS8EBj5b06M9kHyZuIr4El6WQ==",
       "dev": true,
       "requires": {
-        "define-properties": "^1.1.2",
-        "es-abstract": "^1.7.0"
+        "define-properties": "^1.1.3",
+        "es-abstract": "^1.17.0",
+        "is-string": "^1.0.5"
+      },
+      "dependencies": {
+        "es-abstract": {
+          "version": "1.17.0",
+          "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.17.0.tgz",
+          "integrity": "sha512-yYkE07YF+6SIBmg1MsJ9dlub5L48Ek7X0qz+c/CPCHS9EBXfESorzng4cJQjJW5/pB6vDF41u7F8vUhLVDqIug==",
+          "dev": true,
+          "requires": {
+            "es-to-primitive": "^1.2.1",
+            "function-bind": "^1.1.1",
+            "has": "^1.0.3",
+            "has-symbols": "^1.0.1",
+            "is-callable": "^1.1.5",
+            "is-regex": "^1.0.5",
+            "object-inspect": "^1.7.0",
+            "object-keys": "^1.1.1",
+            "object.assign": "^4.1.0",
+            "string.prototype.trimleft": "^2.1.1",
+            "string.prototype.trimright": "^2.1.1"
+          }
+        },
+        "es-to-primitive": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.2.1.tgz",
+          "integrity": "sha512-QCOllgZJtaUo9miYBcLChTUaHNjJF3PYs1VidD7AwiEj1kYxKeQTctLAezAOH5ZKRH0g2IgPn6KwB4IT8iRpvA==",
+          "dev": true,
+          "requires": {
+            "is-callable": "^1.1.4",
+            "is-date-object": "^1.0.1",
+            "is-symbol": "^1.0.2"
+          }
+        },
+        "has-symbols": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.1.tgz",
+          "integrity": "sha512-PLcsoqu++dmEIZB+6totNFKq/7Do+Z0u4oT0zKOJNl3lYK6vGwwu2hjHs+68OEZbTjiUE9bgOABXbP/GvrS0Kg==",
+          "dev": true
+        },
+        "is-callable": {
+          "version": "1.1.5",
+          "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.1.5.tgz",
+          "integrity": "sha512-ESKv5sMCJB2jnHTWZ3O5itG+O128Hsus4K4Qh1h2/cgn2vbgnLSVqfV46AeJA9D5EeeLa9w81KUXMtn34zhX+Q==",
+          "dev": true
+        },
+        "is-regex": {
+          "version": "1.0.5",
+          "resolved": "https://registry.npmjs.org/is-regex/-/is-regex-1.0.5.tgz",
+          "integrity": "sha512-vlKW17SNq44owv5AQR3Cq0bQPEb8+kF3UKZ2fiZNOWtztYE5i0CzCZxFDwO58qAOWtxdBRVO/V5Qin1wjCqFYQ==",
+          "dev": true,
+          "requires": {
+            "has": "^1.0.3"
+          }
+        },
+        "object-inspect": {
+          "version": "1.7.0",
+          "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.7.0.tgz",
+          "integrity": "sha512-a7pEHdh1xKIAgTySUGgLMx/xwDZskN1Ud6egYYN3EdRW4ZMPNEDUTF+hwy2LUC+Bl+SyLXANnwz/jyh/qutKUw==",
+          "dev": true
+        },
+        "object-keys": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
+          "integrity": "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==",
+          "dev": true
+        }
       }
     },
     "array-map": {
@@ -855,6 +921,81 @@
       "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
       "dev": true
     },
+    "array.prototype.flat": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/array.prototype.flat/-/array.prototype.flat-1.2.3.tgz",
+      "integrity": "sha512-gBlRZV0VSmfPIeWfuuy56XZMvbVfbEUnOXUvt3F/eUUUSyzlgLxhEX4YAEpxNAogRGehPSnfXyPtYyKAhkzQhQ==",
+      "dev": true,
+      "requires": {
+        "define-properties": "^1.1.3",
+        "es-abstract": "^1.17.0-next.1"
+      },
+      "dependencies": {
+        "es-abstract": {
+          "version": "1.17.0",
+          "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.17.0.tgz",
+          "integrity": "sha512-yYkE07YF+6SIBmg1MsJ9dlub5L48Ek7X0qz+c/CPCHS9EBXfESorzng4cJQjJW5/pB6vDF41u7F8vUhLVDqIug==",
+          "dev": true,
+          "requires": {
+            "es-to-primitive": "^1.2.1",
+            "function-bind": "^1.1.1",
+            "has": "^1.0.3",
+            "has-symbols": "^1.0.1",
+            "is-callable": "^1.1.5",
+            "is-regex": "^1.0.5",
+            "object-inspect": "^1.7.0",
+            "object-keys": "^1.1.1",
+            "object.assign": "^4.1.0",
+            "string.prototype.trimleft": "^2.1.1",
+            "string.prototype.trimright": "^2.1.1"
+          }
+        },
+        "es-to-primitive": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/es-to-primitive/-/es-to-primitive-1.2.1.tgz",
+          "integrity": "sha512-QCOllgZJtaUo9miYBcLChTUaHNjJF3PYs1VidD7AwiEj1kYxKeQTctLAezAOH5ZKRH0g2IgPn6KwB4IT8iRpvA==",
+          "dev": true,
+          "requires": {
+            "is-callable": "^1.1.4",
+            "is-date-object": "^1.0.1",
+            "is-symbol": "^1.0.2"
+          }
+        },
+        "has-symbols": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.1.tgz",
+          "integrity": "sha512-PLcsoqu++dmEIZB+6totNFKq/7Do+Z0u4oT0zKOJNl3lYK6vGwwu2hjHs+68OEZbTjiUE9bgOABXbP/GvrS0Kg==",
+          "dev": true
+        },
+        "is-callable": {
+          "version": "1.1.5",
+          "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.1.5.tgz",
+          "integrity": "sha512-ESKv5sMCJB2jnHTWZ3O5itG+O128Hsus4K4Qh1h2/cgn2vbgnLSVqfV46AeJA9D5EeeLa9w81KUXMtn34zhX+Q==",
+          "dev": true
+        },
+        "is-regex": {
+          "version": "1.0.5",
+          "resolved": "https://registry.npmjs.org/is-regex/-/is-regex-1.0.5.tgz",
+          "integrity": "sha512-vlKW17SNq44owv5AQR3Cq0bQPEb8+kF3UKZ2fiZNOWtztYE5i0CzCZxFDwO58qAOWtxdBRVO/V5Qin1wjCqFYQ==",
+          "dev": true,
+          "requires": {
+            "has": "^1.0.3"
+          }
+        },
+        "object-inspect": {
+          "version": "1.7.0",
+          "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.7.0.tgz",
+          "integrity": "sha512-a7pEHdh1xKIAgTySUGgLMx/xwDZskN1Ud6egYYN3EdRW4ZMPNEDUTF+hwy2LUC+Bl+SyLXANnwz/jyh/qutKUw==",
+          "dev": true
+        },
+        "object-keys": {
+          "version": "1.1.1",
+          "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
+          "integrity": "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==",
+          "dev": true
+        }
+      }
+    },
     "arraybuffer.slice": {
       "version": "0.0.7",
       "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
@@ -5013,47 +5154,48 @@
       }
     },
     "eslint": {
-      "version": "5.16.0",
-      "resolved": "https://registry.npmjs.org/eslint/-/eslint-5.16.0.tgz",
-      "integrity": "sha512-S3Rz11i7c8AA5JPv7xAH+dOyq/Cu/VXHiHXBPOU1k/JAM5dXqQPt3qcrhpHSorXmrpu2g0gkIBVXAqCpzfoZIg==",
+      "version": "6.8.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-6.8.0.tgz",
+      "integrity": "sha512-K+Iayyo2LtyYhDSYwz5D5QdWw0hCacNzyq1Y821Xna2xSJj7cijoLLYmLxTQgcgZ9mC61nryMy9S7GRbYpI5Ig==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",
-        "ajv": "^6.9.1",
+        "ajv": "^6.10.0",
         "chalk": "^2.1.0",
         "cross-spawn": "^6.0.5",
         "debug": "^4.0.1",
         "doctrine": "^3.0.0",
-        "eslint-scope": "^4.0.3",
-        "eslint-utils": "^1.3.1",
-        "eslint-visitor-keys": "^1.0.0",
-        "espree": "^5.0.1",
+        "eslint-scope": "^5.0.0",
+        "eslint-utils": "^1.4.3",
+        "eslint-visitor-keys": "^1.1.0",
+        "espree": "^6.1.2",
         "esquery": "^1.0.1",
         "esutils": "^2.0.2",
         "file-entry-cache": "^5.0.1",
         "functional-red-black-tree": "^1.0.1",
-        "glob": "^7.1.2",
-        "globals": "^11.7.0",
+        "glob-parent": "^5.0.0",
+        "globals": "^12.1.0",
         "ignore": "^4.0.6",
         "import-fresh": "^3.0.0",
         "imurmurhash": "^0.1.4",
-        "inquirer": "^6.2.2",
-        "js-yaml": "^3.13.0",
+        "inquirer": "^7.0.0",
+        "is-glob": "^4.0.0",
+        "js-yaml": "^3.13.1",
         "json-stable-stringify-without-jsonify": "^1.0.1",
         "levn": "^0.3.0",
-        "lodash": "^4.17.11",
+        "lodash": "^4.17.14",
         "minimatch": "^3.0.4",
         "mkdirp": "^0.5.1",
         "natural-compare": "^1.4.0",
-        "optionator": "^0.8.2",
-        "path-is-inside": "^1.0.2",
+        "optionator": "^0.8.3",
         "progress": "^2.0.0",
         "regexpp": "^2.0.1",
-        "semver": "^5.5.1",
-        "strip-ansi": "^4.0.0",
-        "strip-json-comments": "^2.0.1",
+        "semver": "^6.1.2",
+        "strip-ansi": "^5.2.0",
+        "strip-json-comments": "^3.0.1",
         "table": "^5.2.3",
-        "text-table": "^0.2.0"
+        "text-table": "^0.2.0",
+        "v8-compile-cache": "^2.0.3"
       },
       "dependencies": {
         "debug": {
@@ -5065,37 +5207,102 @@
             "ms": "^2.1.1"
           }
         },
+        "eslint-utils": {
+          "version": "1.4.3",
+          "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-1.4.3.tgz",
+          "integrity": "sha512-fbBN5W2xdY45KulGXmLHZ3c3FHfVYmKg0IrAKGOkT/464PQsx2UeIzfz1RmEci+KLm1bBaAzZAh8+/E+XAeZ8Q==",
+          "dev": true,
+          "requires": {
+            "eslint-visitor-keys": "^1.1.0"
+          }
+        },
+        "eslint-visitor-keys": {
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-1.1.0.tgz",
+          "integrity": "sha512-8y9YjtM1JBJU/A9Kc+SbaOV4y29sSWckBwMHa+FGtVj5gN/sbnKDf6xJUl+8g7FAij9LVaP8C24DUiH/f/2Z9A==",
+          "dev": true
+        },
+        "glob-parent": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.0.tgz",
+          "integrity": "sha512-qjtRgnIVmOfnKUE3NJAQEdk+lKrxfw8t5ke7SXtfMTHcjsBfOfWXCQfdb30zfDoZQ2IRSIiidmjtbHZPZ++Ihw==",
+          "dev": true,
+          "requires": {
+            "is-glob": "^4.0.1"
+          }
+        },
+        "globals": {
+          "version": "12.3.0",
+          "resolved": "https://registry.npmjs.org/globals/-/globals-12.3.0.tgz",
+          "integrity": "sha512-wAfjdLgFsPZsklLJvOBUBmzYE8/CwhEqSBEMRXA3qxIiNtyqvjYurAtIfDh6chlEPUfmTY3MnZh5Hfh4q0UlIw==",
+          "dev": true,
+          "requires": {
+            "type-fest": "^0.8.1"
+          }
+        },
         "import-fresh": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-3.0.0.tgz",
-          "integrity": "sha512-pOnA9tfM3Uwics+SaBLCNyZZZbK+4PTu0OPZtLlMIrv17EdBoC15S9Kn8ckJ9TZTyKb3ywNE5y1yeDxxGA7nTQ==",
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-3.2.1.tgz",
+          "integrity": "sha512-6e1q1cnWP2RXD9/keSkxHScg508CdXqXWgWBaETNhyuBFz+kUZlKboh+ISK+bU++DmbHimVBrOz/zzPe0sZ3sQ==",
           "dev": true,
           "requires": {
             "parent-module": "^1.0.0",
             "resolve-from": "^4.0.0"
           }
         },
+        "is-glob": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.1.tgz",
+          "integrity": "sha512-5G0tKtBTFImOqDnLB2hG6Bp2qcKEFduo4tZu9MT/H6NQv/ghhy30o55ufafxJ/LdH79LLs2Kfrn85TLKyA7BUg==",
+          "dev": true,
+          "requires": {
+            "is-extglob": "^2.1.1"
+          }
+        },
+        "optionator": {
+          "version": "0.8.3",
+          "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.8.3.tgz",
+          "integrity": "sha512-+IW9pACdk3XWmmTXG8m3upGUJst5XRGzxMRjXzAuJ1XnIFNvfhjjIuYkDvysnPQ7qzqVzLt78BCruntqRhWQbA==",
+          "dev": true,
+          "requires": {
+            "deep-is": "~0.1.3",
+            "fast-levenshtein": "~2.0.6",
+            "levn": "~0.3.0",
+            "prelude-ls": "~1.1.2",
+            "type-check": "~0.3.2",
+            "word-wrap": "~1.2.3"
+          }
+        },
         "resolve-from": {
           "version": "4.0.0",
           "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
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           "dev": true
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-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-4.0.0.tgz",
-          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
-          "dev": true,
-          "requires": {
-            "ansi-regex": "^3.0.0"
-          }
+        "semver": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
+          "dev": true
+        },
+        "strip-json-comments": {
+          "version": "3.0.1",
+          "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-3.0.1.tgz",
+          "integrity": "sha512-VTyMAUfdm047mwKl+u79WIdrZxtFtn+nBxHeb844XBQ9uMNTuTHdx2hc5RiAJYqwTj3wc/xe5HLSdJSkJ+WfZw==",
+          "dev": true
+        },
+        "type-fest": {
+          "version": "0.8.1",
+          "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.8.1.tgz",
+          "integrity": "sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==",
+          "dev": true
         }
       }
     },
     "eslint-config-prettier": {
-      "version": "3.6.0",
-      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-3.6.0.tgz",
-      "integrity": "sha512-ixJ4U3uTLXwJts4rmSVW/lMXjlGwCijhBJHk8iVqKKSifeI0qgFEfWl8L63isfc8Od7EiBALF6BX3jKLluf/jQ==",
+      "version": "6.9.0",
+      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-6.9.0.tgz",
+      "integrity": "sha512-k4E14HBtcLv0uqThaI6I/n1LEqROp8XaPu6SO9Z32u5NlGRC07Enu1Bh2KEFw4FNHbekH8yzbIU9kUGxbiGmCA==",
       "dev": true,
       "requires": {
         "get-stdin": "^6.0.0"
@@ -5110,15 +5317,15 @@
       }
     },
     "eslint-config-semistandard": {
-      "version": "13.0.0",
-      "resolved": "https://registry.npmjs.org/eslint-config-semistandard/-/eslint-config-semistandard-13.0.0.tgz",
-      "integrity": "sha512-ZuImKnf/9LeZjr6dtRJ0zEdQbjBwXu0PJR3wXJXoQeMooICMrYPyD70O1tIA9Ng+wutgLjB7UXvZOKYPvzHg+w==",
+      "version": "15.0.0",
+      "resolved": "https://registry.npmjs.org/eslint-config-semistandard/-/eslint-config-semistandard-15.0.0.tgz",
+      "integrity": "sha512-volIMnosUvzyxGkYUA5QvwkahZZLeUx7wcS0+7QumPn+MMEBbV6P7BY1yukamMst0w3Et3QZlCjQEwQ8tQ6nug==",
       "dev": true
     },
     "eslint-config-standard": {
-      "version": "12.0.0",
-      "resolved": "https://registry.npmjs.org/eslint-config-standard/-/eslint-config-standard-12.0.0.tgz",
-      "integrity": "sha512-COUz8FnXhqFitYj4DTqHzidjIL/t4mumGZto5c7DrBpvWoie+Sn3P4sLEzUGeYhRElWuFEf8K1S1EfvD1vixCQ==",
+      "version": "14.1.0",
+      "resolved": "https://registry.npmjs.org/eslint-config-standard/-/eslint-config-standard-14.1.0.tgz",
+      "integrity": "sha512-EF6XkrrGVbvv8hL/kYa/m6vnvmUT+K82pJJc4JJVMM6+Qgqh0pnwprSxdduDLB9p/7bIxD+YV5O0wfb8lmcPbA==",
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+          "dev": true
+        },
+        "mimic-fn": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-2.1.0.tgz",
+          "integrity": "sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg==",
+          "dev": true
+        },
+        "onetime": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/onetime/-/onetime-5.1.0.tgz",
+          "integrity": "sha512-5NcSkPHhwTVFIQN+TUqXoS5+dlElHXdpAWu9I0HP20YOtIi+aZ0Ct82jdlILDxjLEAWwvm+qj1m6aEtsDVmm6Q==",
+          "dev": true,
+          "requires": {
+            "mimic-fn": "^2.1.0"
+          }
+        },
+        "restore-cursor": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/restore-cursor/-/restore-cursor-3.1.0.tgz",
+          "integrity": "sha512-l+sSefzHpj5qimhFSE5a8nufZYAM3sBSVMAPtYkmC+4EH2anSGaEMXSD0izRQbu9nfyQ9y5JrVmp7E8oZrUjvA==",
+          "dev": true,
+          "requires": {
+            "onetime": "^5.1.0",
+            "signal-exit": "^3.0.2"
+          }
+        },
         "rxjs": {
-          "version": "6.5.2",
-          "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.2.tgz",
-          "integrity": "sha512-HUb7j3kvb7p7eCUHE3FqjoDsC1xfZQ4AHFWfTKSpZ+sAhhz5X1WX0ZuUqWbzB2QhSLp3DoLUG+hMdEDKqWo2Zg==",
+          "version": "6.5.4",
+          "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.4.tgz",
+          "integrity": "sha512-naMQXcgEo3csAEGvw/NydRA0fuS2nDZJiw1YUWFKU7aPPAPGZEsD4Iimit96qwCieH6y614MCLYwdkrWx7z/7Q==",
           "dev": true,
           "requires": {
             "tslib": "^1.9.0"
           }
+        },
+        "string-width": {
+          "version": "4.2.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.0.tgz",
+          "integrity": "sha512-zUz5JD+tgqtuDjMhwIg5uFVV3dtqZ9yQJlZVfq4I01/K5Paj5UHj7VyrQOJvzawSVlKpObApbfD0Ed6yJc+1eg==",
+          "dev": true,
+          "requires": {
+            "emoji-regex": "^8.0.0",
+            "is-fullwidth-code-point": "^3.0.0",
+            "strip-ansi": "^6.0.0"
+          },
+          "dependencies": {
+            "strip-ansi": {
+              "version": "6.0.0",
+              "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
+              "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
+              "dev": true,
+              "requires": {
+                "ansi-regex": "^5.0.0"
+              }
+            }
+          }
+        },
+        "type-fest": {
+          "version": "0.8.1",
+          "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.8.1.tgz",
+          "integrity": "sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==",
+          "dev": true
         }
       }
     },
@@ -8817,6 +9149,12 @@
       "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ=",
       "dev": true
     },
+    "is-string": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/is-string/-/is-string-1.0.5.tgz",
+      "integrity": "sha512-buY6VNRjhQMiF1qWDouloZlQbRhDPCebwxSjxMjxgemYT46YMd2NR0/H+fBhEfWX4A/w9TBJ+ol+okqJKFE6vQ==",
+      "dev": true
+    },
     "is-svg": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/is-svg/-/is-svg-3.0.0.tgz",
@@ -11151,9 +11489,9 @@
       "dev": true
     },
     "mute-stream": {
-      "version": "0.0.7",
-      "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.7.tgz",
-      "integrity": "sha1-MHXOk7whuPq0PhvE2n6BFe0ee6s=",
+      "version": "0.0.8",
+      "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.8.tgz",
+      "integrity": "sha512-nnbWWOkoWyUsTjKrhgD0dcz22mdkSnpYqbEjIm2nhwhuxlSkpywJmBo8h0ZqJdkp73mb90SssHkN4rsRaBAfAA==",
       "dev": true
     },
     "nan": {
@@ -16046,6 +16384,26 @@
       "integrity": "sha1-q6Nt4I3O5qWjN9SbLqHaGyj8Ds8=",
       "dev": true
     },
+    "string.prototype.trimleft": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimleft/-/string.prototype.trimleft-2.1.1.tgz",
+      "integrity": "sha512-iu2AGd3PuP5Rp7x2kEZCrB2Nf41ehzh+goo8TV7z8/XDBbsvc6HQIlUl9RjkZ4oyrW1XM5UwlGl1oVEaDjg6Ag==",
+      "dev": true,
+      "requires": {
+        "define-properties": "^1.1.3",
+        "function-bind": "^1.1.1"
+      }
+    },
+    "string.prototype.trimright": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimright/-/string.prototype.trimright-2.1.1.tgz",
+      "integrity": "sha512-qFvWL3/+QIgZXVmJBfpHmxLB7xsUXz6HsUmP8+5dRaC3Q7oKUv9Vo6aMCRZC1smrtyECFsIT30PqBJ1gTjAs+g==",
+      "dev": true,
+      "requires": {
+        "define-properties": "^1.1.3",
+        "function-bind": "^1.1.1"
+      }
+    },
     "string_decoder": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
@@ -16311,17 +16669,29 @@
       }
     },
     "table": {
-      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/table/-/table-5.4.0.tgz",
-      "integrity": "sha512-nHFDrxmbrkU7JAFKqKbDJXfzrX2UBsWmrieXFTGxiI5e4ncg3VqsZeI4EzNmX0ncp4XNGVeoxIWJXfCIXwrsvw==",
+      "version": "5.4.6",
+      "resolved": "https://registry.npmjs.org/table/-/table-5.4.6.tgz",
+      "integrity": "sha512-wmEc8m4fjnob4gt5riFRtTu/6+4rSe12TpAELNSqHMfF3IqnA+CH37USM6/YR3qRZv7e56kAEAtd6nKZaxe0Ug==",
       "dev": true,
       "requires": {
-        "ajv": "^6.9.1",
-        "lodash": "^4.17.11",
+        "ajv": "^6.10.2",
+        "lodash": "^4.17.14",
         "slice-ansi": "^2.1.0",
         "string-width": "^3.0.0"
       },
       "dependencies": {
+        "ajv": {
+          "version": "6.10.2",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
+          "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^2.0.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
+        },
         "string-width": {
           "version": "3.1.0",
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
@@ -17602,6 +17972,12 @@
       "integrity": "sha512-yXJmeNaw3DnnKAOKJE51sL/ZaYfWJRl1pK9dr19YFCu0ObS231AB1/LbqTKRAQ5kw8A90rA6fr4riOUpTZvQZA==",
       "dev": true
     },
+    "v8-compile-cache": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.0.tgz",
+      "integrity": "sha512-usZBT3PW+LOjM25wbqIlZwPeJV+3OSz3M1k1Ws8snlW39dZyYL9lOGC5FgPVHfk0jKmjiDV8Z0mIbVQPiwFs7g==",
+      "dev": true
+    },
     "valid-url": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/valid-url/-/valid-url-1.0.9.tgz",
@@ -17888,6 +18264,12 @@
         }
       }
     },
+    "word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
+      "dev": true
+    },
     "wordwrap": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
diff --git a/package.json b/package.json
index 045314b857..fcebd7f32e 100644
--- a/package.json
+++ b/package.json
@@ -81,15 +81,15 @@
     "coveralls": "^3.0.3",
     "cross-env": "^5.2.0",
     "cross-spawn": "^6.0.5",
-    "eslint": "^5.16.0",
-    "eslint-config-prettier": "^3.6.0",
-    "eslint-config-semistandard": "^13.0.0",
-    "eslint-config-standard": "^12.0.0",
-    "eslint-plugin-import": "^2.17.3",
-    "eslint-plugin-node": "^8.0.1",
-    "eslint-plugin-prettier": "^3.1.0",
-    "eslint-plugin-promise": "^4.1.1",
-    "eslint-plugin-standard": "^4.0.0",
+    "eslint": "^6.8.0",
+    "eslint-config-prettier": "^6.9.0",
+    "eslint-config-semistandard": "^15.0.0",
+    "eslint-config-standard": "^14.1.0",
+    "eslint-plugin-import": "^2.19.1",
+    "eslint-plugin-node": "^11.0.0",
+    "eslint-plugin-prettier": "^3.1.2",
+    "eslint-plugin-promise": "^4.2.1",
+    "eslint-plugin-standard": "^4.0.1",
     "fs-extra": "^8.0.1",
     "husky": "^1.3.1",
     "hyperlink": "^4.3.1",
diff --git a/scripts/netlify-headers.js b/scripts/netlify-headers.js
index d74842bfce..4faae6f13d 100644
--- a/scripts/netlify-headers.js
+++ b/scripts/netlify-headers.js
@@ -92,7 +92,7 @@ new AssetGraph({root: 'docs/_dist'})
       );
 
       preconnectRelations.forEach(rel => {
-        let header = `Link: <${rel.href}>; rel=preconnect`;
+        const header = `Link: <${rel.href}>; rel=preconnect`;
 
         headerMap[url].push(header);
 
diff --git a/test/reporters/base.spec.js b/test/reporters/base.spec.js
index 18867ae6fa..744b92e69b 100644
--- a/test/reporters/base.spec.js
+++ b/test/reporters/base.spec.js
@@ -17,13 +17,9 @@ describe('Base reporter', function() {
 
   function list(tests) {
     try {
-      try {
-        Base.list(tests);
-      } finally {
-        sandbox.restore();
-      }
-    } catch (err) {
-      throw err; // Rethrow
+      Base.list(tests);
+    } finally {
+      sandbox.restore();
     }
   }
 
@@ -31,13 +27,9 @@ describe('Base reporter', function() {
     var diffStr;
 
     try {
-      try {
-        diffStr = Base.generateDiff(actual, expected);
-      } finally {
-        sandbox.restore();
-      }
-    } catch (err) {
-      throw err; // Rethrow
+      diffStr = Base.generateDiff(actual, expected);
+    } finally {
+      sandbox.restore();
     }
 
     return diffStr;
diff --git a/test/reporters/helpers.js b/test/reporters/helpers.js
index 76b3d79307..45c4d916de 100644
--- a/test/reporters/helpers.js
+++ b/test/reporters/helpers.js
@@ -215,16 +215,12 @@ function createRunReporterFunction(ctor) {
     Object.setPrototypeOf(stubSelf, ctor.prototype);
 
     try {
-      try {
-        // Invoke reporter
-        ctor.call(stubSelf, runner, options);
-      } finally {
-        // Revert stream reassignment here so reporter output
-        // can't be corrupted if any test assertions throw
-        stdoutWriteStub.restore();
-      }
-    } catch (err) {
-      throw err; // Rethrow
+      // Invoke reporter
+      ctor.call(stubSelf, runner, options);
+    } finally {
+      // Revert stream reassignment here so reporter output
+      // can't be corrupted if any test assertions throw
+      stdoutWriteStub.restore();
     }
 
     return stdout;
diff --git a/test/reporters/nyan.spec.js b/test/reporters/nyan.spec.js
index 05d2e1bf77..ce65e97d85 100644
--- a/test/reporters/nyan.spec.js
+++ b/test/reporters/nyan.spec.js
@@ -192,13 +192,9 @@ describe('Nyan reporter', function() {
         };
 
         try {
-          try {
-            nyanCat.draw.call(fakeThis);
-          } finally {
-            sandbox.restore();
-          }
-        } catch (err) {
-          throw err; // Rethrow
+          nyanCat.draw.call(fakeThis);
+        } finally {
+          sandbox.restore();
         }
 
         var expectedArray = [
@@ -239,13 +235,9 @@ describe('Nyan reporter', function() {
         };
 
         try {
-          try {
-            nyanCat.draw.call(fakeThis);
-          } finally {
-            sandbox.restore();
-          }
-        } catch (err) {
-          throw err; // Rethrow
+          nyanCat.draw.call(fakeThis);
+        } finally {
+          sandbox.restore();
         }
 
         var expectedArray = [
@@ -286,13 +278,9 @@ describe('Nyan reporter', function() {
       var expectedNumber = 25;
 
       try {
-        try {
-          nyanCat.cursorDown(expectedNumber);
-        } finally {
-          sandbox.restore();
-        }
-      } catch (err) {
-        throw err; // Rethrow
+        nyanCat.cursorDown(expectedNumber);
+      } finally {
+        sandbox.restore();
       }
 
       var expectedArray = ['\u001b[' + expectedNumber + 'B'];
@@ -319,13 +307,9 @@ describe('Nyan reporter', function() {
       var expectedNumber = 25;
 
       try {
-        try {
-          nyanCat.cursorUp(expectedNumber);
-        } finally {
-          sandbox.restore();
-        }
-      } catch (err) {
-        throw err; // Rethrow
+        nyanCat.cursorUp(expectedNumber);
+      } finally {
+        sandbox.restore();
       }
 
       var expectedArray = ['\u001b[' + expectedNumber + 'A'];
@@ -495,13 +479,9 @@ describe('Nyan reporter', function() {
       };
 
       try {
-        try {
-          nyanCat.drawScoreboard.call(fakeThis);
-        } finally {
-          sandbox.restore();
-        }
-      } catch (err) {
-        throw err; // Rethrow
+        nyanCat.drawScoreboard.call(fakeThis);
+      } finally {
+        sandbox.restore();
       }
 
       var expectedArray = [
@@ -532,13 +512,9 @@ describe('Nyan reporter', function() {
       };
 
       try {
-        try {
-          nyanCat.drawScoreboard.call(fakeThis);
-        } finally {
-          sandbox.restore();
-        }
-      } catch (err) {
-        throw err; // Rethrow
+        nyanCat.drawScoreboard.call(fakeThis);
+      } finally {
+        sandbox.restore();
       }
 
       expect(fakeThis.cursorUp.calledWith(expectedNumberOfLines), 'to be true');
@@ -573,13 +549,9 @@ describe('Nyan reporter', function() {
       };
 
       try {
-        try {
-          nyanCat.drawRainbow.call(fakeThis);
-        } finally {
-          sandbox.restore();
-        }
-      } catch (err) {
-        throw err; // Rethrow
+        nyanCat.drawRainbow.call(fakeThis);
+      } finally {
+        sandbox.restore();
       }
 
       var expectedArray = [
@@ -607,13 +579,9 @@ describe('Nyan reporter', function() {
       };
 
       try {
-        try {
-          nyanCat.drawRainbow.call(fakeThis);
-        } finally {
-          sandbox.restore();
-        }
-      } catch (err) {
-        throw err; // Rethrow
+        nyanCat.drawRainbow.call(fakeThis);
+      } finally {
+        sandbox.restore();
       }
 
       expect(expectedCursorArgument, 'to be', expectedNumberOfLines);
diff --git a/test/unit/runner.spec.js b/test/unit/runner.spec.js
index b36cbb04bf..92b41c5fc4 100644
--- a/test/unit/runner.spec.js
+++ b/test/unit/runner.spec.js
@@ -149,7 +149,11 @@ describe('Runner', function() {
         return;
       }
       // verify that the prop isn't enumerable
-      expect(global.propertyIsEnumerable('XMLHttpRequest'), 'to be', false);
+      expect(
+        Object.prototype.propertyIsEnumerable.call(global, 'XMLHttpRequest'),
+        'to be',
+        false
+      );
 
       // create a new runner and keep a reference to the test.
       var test = new Test('im a test about bears', noop);
@@ -158,7 +162,11 @@ describe('Runner', function() {
 
       // make the prop enumerable again.
       global.XMLHttpRequest = noop;
-      expect(global.propertyIsEnumerable('XMLHttpRequest'), 'to be', true);
+      expect(
+        Object.prototype.propertyIsEnumerable.call(global, 'XMLHttpRequest'),
+        'to be',
+        true
+      );
 
       // verify the test hasn't failed.
       newRunner.checkGlobals(test);