diff --git a/package-lock.json b/package-lock.json
index 770f7cc..4a1d391 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -57,6 +57,16 @@
       "requires": {
         "micromatch": "^3.1.4",
         "normalize-path": "^2.1.1"
+      },
+      "dependencies": {
+        "normalize-path": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-2.1.1.tgz",
+          "integrity": "sha1-GrKLVW4Zg2Oowab35vogE3/mrtk=",
+          "requires": {
+            "remove-trailing-separator": "^1.0.1"
+          }
+        }
       }
     },
     "append-field": {
@@ -108,9 +118,9 @@
       "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c="
     },
     "async-each": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.1.tgz",
-      "integrity": "sha1-GdOGodntxufByF04iu28xW0zYC0="
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.3.tgz",
+      "integrity": "sha512-z/WhQ5FPySLdvREByI2vZiTWwCnF0moMJ1hK9YQwDTHKh6I7/uSckMetoRGb5UBZPC1z0jlw+n/XCgjeH7y1AQ=="
     },
     "asynckit": {
       "version": "0.4.0",
@@ -196,9 +206,18 @@
       }
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     "binary-extensions": {
-      "version": "1.12.0",
-      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-1.12.0.tgz",
-      "integrity": "sha512-DYWGk01lDcxeS/K9IHPGWfT8PsJmbXRtRd2Sx72Tnb8pcYZQFF1oSDb8hJtS1vhp212q1Rzi5dUf9+nq0o9UIg=="
+      "version": "1.13.1",
+      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-1.13.1.tgz",
+      "integrity": "sha512-Un7MIEDdUC5gNpcGDV97op1Ywk748MpHcFTHoYs6qnj1Z3j7I53VG3nwZhKzoBZmbdRNnb6WRdFlwl7tSDuZGw=="
+    },
+    "bindings": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.5.0.tgz",
+      "integrity": "sha512-p2q/t/mhvuOj/UeLlV6566GD/guowlr0hHxClI0W9m7MWYkL1F0hLo+0Aexs9HSPCtR1SXQ0TD3MMKrXZajbiQ==",
+      "optional": true,
+      "requires": {
+        "file-uri-to-path": "1.0.0"
+      }
     },
     "body-parser": {
       "version": "1.18.3",
@@ -378,23 +397,22 @@
       }
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     "chokidar": {
-      "version": "2.0.4",
-      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.0.4.tgz",
-      "integrity": "sha512-z9n7yt9rOvIJrMhvDtDictKrkFHeihkNl6uWMmZlmL6tJtX9Cs+87oK+teBx+JIgzvbX3yZHT3eF8vpbDxHJXQ==",
+      "version": "2.1.8",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.1.8.tgz",
+      "integrity": "sha512-ZmZUazfOzf0Nve7duiCKD23PFSCs4JPoYyccjUFF3aQkQadqBhfzhjkwBH2mNOG9cTBwhamM37EIsIkZw3nRgg==",
       "requires": {
         "anymatch": "^2.0.0",
-        "async-each": "^1.0.0",
-        "braces": "^2.3.0",
-        "fsevents": "^1.2.2",
+        "async-each": "^1.0.1",
+        "braces": "^2.3.2",
+        "fsevents": "^1.2.7",
         "glob-parent": "^3.1.0",
-        "inherits": "^2.0.1",
+        "inherits": "^2.0.3",
         "is-binary-path": "^1.0.0",
         "is-glob": "^4.0.0",
-        "lodash.debounce": "^4.0.8",
-        "normalize-path": "^2.1.1",
+        "normalize-path": "^3.0.0",
         "path-is-absolute": "^1.0.0",
-        "readdirp": "^2.0.0",
-        "upath": "^1.0.5"
+        "readdirp": "^2.2.1",
+        "upath": "^1.1.1"
       }
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@@ -474,9 +492,9 @@
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     "component-emitter": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.2.1.tgz",
-      "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY="
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz",
+      "integrity": "sha512-Rd3se6QB+sO1TwqZjscQrurpEPIfO0/yYnSin6Q/rD3mOutHvUrCAhJub3r90uNb+SESBuE0QYoB90YdfatsRg=="
     },
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       "version": "0.0.1",
@@ -998,6 +1016,12 @@
       "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz",
       "integrity": "sha1-1RQsDK7msRifh9OnYREGT4bIu/I="
     },
+    "file-uri-to-path": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/file-uri-to-path/-/file-uri-to-path-1.0.0.tgz",
+      "integrity": "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw==",
+      "optional": true
+    },
     "fill-range": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-4.0.0.tgz",
@@ -1092,13 +1116,14 @@
       "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac="
     },
     "fsevents": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.2.4.tgz",
-      "integrity": "sha512-z8H8/diyk76B7q5wg+Ud0+CqzcAF3mBBI/bA5ne5zrRUUIvNkJY//D3BqyH571KuAC4Nr7Rw7CjWX4r0y9DvNg==",
+      "version": "1.2.12",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-1.2.12.tgz",
+      "integrity": "sha512-Ggd/Ktt7E7I8pxZRbGIs7vwqAPscSESMrCSkx2FtWeqmheJgCo2R74fTsZFCifr0VTPwqRpPv17+6b8Zp7th0Q==",
       "optional": true,
       "requires": {
-        "nan": "^2.9.2",
-        "node-pre-gyp": "^0.10.0"
+        "bindings": "^1.5.0",
+        "nan": "^2.12.1",
+        "node-pre-gyp": "*"
       },
       "dependencies": {
         "abbrev": {
@@ -1108,7 +1133,8 @@
         },
         "ansi-regex": {
           "version": "2.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -1116,7 +1142,7 @@
           "optional": true
         },
         "are-we-there-yet": {
-          "version": "1.1.4",
+          "version": "1.1.5",
           "bundled": true,
           "optional": true,
           "requires": {
@@ -1126,32 +1152,37 @@
         },
         "balanced-match": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
           }
         },
         "chownr": {
-          "version": "1.0.1",
+          "version": "1.1.4",
           "bundled": true,
           "optional": true
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -1159,15 +1190,15 @@
           "optional": true
         },
         "debug": {
-          "version": "2.6.9",
+          "version": "3.2.6",
           "bundled": true,
           "optional": true,
           "requires": {
-            "ms": "2.0.0"
+            "ms": "^2.1.1"
           }
         },
         "deep-extend": {
-          "version": "0.5.1",
+          "version": "0.6.0",
           "bundled": true,
           "optional": true
         },
@@ -1182,11 +1213,11 @@
           "optional": true
         },
         "fs-minipass": {
-          "version": "1.2.5",
+          "version": "1.2.7",
           "bundled": true,
           "optional": true,
           "requires": {
-            "minipass": "^2.2.1"
+            "minipass": "^2.6.0"
           }
         },
         "fs.realpath": {
@@ -1210,7 +1241,7 @@
           }
         },
         "glob": {
-          "version": "7.1.2",
+          "version": "7.1.6",
           "bundled": true,
           "optional": true,
           "requires": {
@@ -1228,15 +1259,15 @@
           "optional": true
         },
         "iconv-lite": {
-          "version": "0.4.21",
+          "version": "0.4.24",
           "bundled": true,
           "optional": true,
           "requires": {
-            "safer-buffer": "^2.1.0"
+            "safer-buffer": ">= 2.1.2 < 3"
           }
         },
         "ignore-walk": {
-          "version": "3.0.1",
+          "version": "3.0.3",
           "bundled": true,
           "optional": true,
           "requires": {
@@ -1253,8 +1284,9 @@
           }
         },
         "inherits": {
-          "version": "2.0.3",
-          "bundled": true
+          "version": "2.0.4",
+          "bundled": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1264,6 +1296,7 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -1276,71 +1309,75 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
         },
         "minimist": {
-          "version": "0.0.8",
-          "bundled": true
+          "version": "1.2.5",
+          "bundled": true,
+          "optional": true
         },
         "minipass": {
-          "version": "2.2.4",
+          "version": "2.9.0",
           "bundled": true,
+          "optional": true,
           "requires": {
-            "safe-buffer": "^5.1.1",
+            "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
           }
         },
         "minizlib": {
-          "version": "1.1.0",
+          "version": "1.3.3",
           "bundled": true,
           "optional": true,
           "requires": {
-            "minipass": "^2.2.1"
+            "minipass": "^2.9.0"
           }
         },
         "mkdirp": {
-          "version": "0.5.1",
+          "version": "0.5.3",
           "bundled": true,
+          "optional": true,
           "requires": {
-            "minimist": "0.0.8"
+            "minimist": "^1.2.5"
           }
         },
         "ms": {
-          "version": "2.0.0",
+          "version": "2.1.2",
           "bundled": true,
           "optional": true
         },
         "needle": {
-          "version": "2.2.0",
+          "version": "2.3.3",
           "bundled": true,
           "optional": true,
           "requires": {
-            "debug": "^2.1.2",
+            "debug": "^3.2.6",
             "iconv-lite": "^0.4.4",
             "sax": "^1.2.4"
           }
         },
         "node-pre-gyp": {
-          "version": "0.10.0",
+          "version": "0.14.0",
           "bundled": true,
           "optional": true,
           "requires": {
             "detect-libc": "^1.0.2",
             "mkdirp": "^0.5.1",
-            "needle": "^2.2.0",
+            "needle": "^2.2.1",
             "nopt": "^4.0.1",
             "npm-packlist": "^1.1.6",
             "npmlog": "^4.0.2",
-            "rc": "^1.1.7",
+            "rc": "^1.2.7",
             "rimraf": "^2.6.1",
             "semver": "^5.3.0",
-            "tar": "^4"
+            "tar": "^4.4.2"
           }
         },
         "nopt": {
-          "version": "4.0.1",
+          "version": "4.0.3",
           "bundled": true,
           "optional": true,
           "requires": {
@@ -1349,17 +1386,26 @@
           }
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         "npm-bundled": {
-          "version": "1.0.3",
+          "version": "1.1.1",
+          "bundled": true,
+          "optional": true,
+          "requires": {
+            "npm-normalize-package-bin": "^1.0.1"
+          }
+        },
+        "npm-normalize-package-bin": {
+          "version": "1.0.1",
           "bundled": true,
           "optional": true
         },
         "npm-packlist": {
-          "version": "1.1.10",
+          "version": "1.4.8",
           "bundled": true,
           "optional": true,
           "requires": {
             "ignore-walk": "^3.0.1",
-            "npm-bundled": "^1.0.1"
+            "npm-bundled": "^1.0.1",
+            "npm-normalize-package-bin": "^1.0.1"
           }
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         "npmlog": {
@@ -1375,7 +1421,8 @@
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
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           "version": "4.1.1",
@@ -1385,6 +1432,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -1414,30 +1462,23 @@
           "optional": true
         },
         "process-nextick-args": {
-          "version": "2.0.0",
+          "version": "2.0.1",
           "bundled": true,
           "optional": true
         },
         "rc": {
-          "version": "1.2.7",
+          "version": "1.2.8",
           "bundled": true,
           "optional": true,
           "requires": {
-            "deep-extend": "^0.5.1",
+            "deep-extend": "^0.6.0",
             "ini": "~1.3.0",
             "minimist": "^1.2.0",
             "strip-json-comments": "~2.0.1"
-          },
-          "dependencies": {
-            "minimist": {
-              "version": "1.2.0",
-              "bundled": true,
-              "optional": true
-            }
           }
         },
         "readable-stream": {
-          "version": "2.3.6",
+          "version": "2.3.7",
           "bundled": true,
           "optional": true,
           "requires": {
@@ -1451,16 +1492,17 @@
           }
         },
         "rimraf": {
-          "version": "2.6.2",
+          "version": "2.7.1",
           "bundled": true,
           "optional": true,
           "requires": {
-            "glob": "^7.0.5"
+            "glob": "^7.1.3"
           }
         },
         "safe-buffer": {
-          "version": "5.1.1",
-          "bundled": true
+          "version": "5.1.2",
+          "bundled": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -1473,7 +1515,7 @@
           "optional": true
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         "semver": {
-          "version": "5.5.0",
+          "version": "5.7.1",
           "bundled": true,
           "optional": true
         },
@@ -1490,6 +1532,7 @@
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -1507,6 +1550,7 @@
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -1517,17 +1561,17 @@
           "optional": true
         },
         "tar": {
-          "version": "4.4.1",
+          "version": "4.4.13",
           "bundled": true,
           "optional": true,
           "requires": {
-            "chownr": "^1.0.1",
+            "chownr": "^1.1.1",
             "fs-minipass": "^1.2.5",
-            "minipass": "^2.2.4",
-            "minizlib": "^1.1.0",
+            "minipass": "^2.8.6",
+            "minizlib": "^1.2.1",
             "mkdirp": "^0.5.0",
-            "safe-buffer": "^5.1.1",
-            "yallist": "^3.0.2"
+            "safe-buffer": "^5.1.2",
+            "yallist": "^3.0.3"
           }
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         "util-deprecate": {
@@ -1536,20 +1580,22 @@
           "optional": true
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-          "version": "1.1.2",
+          "version": "1.1.3",
           "bundled": true,
           "optional": true,
           "requires": {
-            "string-width": "^1.0.2"
+            "string-width": "^1.0.2 || 2"
           }
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "yallist": {
-          "version": "3.0.2",
-          "bundled": true
+          "version": "3.1.1",
+          "bundled": true,
+          "optional": true
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@@ -1605,7 +1651,7 @@
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     "got": {
       "version": "6.7.1",
-      "resolved": "http://registry.npmjs.org/got/-/got-6.7.1.tgz",
+      "resolved": "https://registry.npmjs.org/got/-/got-6.7.1.tgz",
       "integrity": "sha1-JAzQV4WpoY5WHcG0S0HHY+8ejbA=",
       "requires": {
         "create-error-class": "^3.0.0",
@@ -1622,9 +1668,9 @@
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-      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.15.tgz",
-      "integrity": "sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA=="
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.3.tgz",
+      "integrity": "sha512-a30VEBm4PEdx1dRB7MFK7BejejvCvBronbLjht+sHuGYj8PHs7M/5Z+rt5lw551vZ7yfTCj4Vuyy3mSJytDWRQ=="
     },
     "gridfs-stream": {
       "version": "1.1.1",
@@ -1859,9 +1905,9 @@
       "integrity": "sha1-wUwhBX7TbjKNuANHlmxpP4hjifM="
     },
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-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.0.tgz",
-      "integrity": "sha1-lSHHaEXMJhCoUgPd8ICpWML/q8A=",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.1.tgz",
+      "integrity": "sha512-5G0tKtBTFImOqDnLB2hG6Bp2qcKEFduo4tZu9MT/H6NQv/ghhy30o55ufafxJ/LdH79LLs2Kfrn85TLKyA7BUg==",
       "requires": {
         "is-extglob": "^2.1.1"
       }
@@ -1900,7 +1946,7 @@
     },
     "is-obj": {
       "version": "1.0.1",
-      "resolved": "http://registry.npmjs.org/is-obj/-/is-obj-1.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/is-obj/-/is-obj-1.0.1.tgz",
       "integrity": "sha1-PkcprB9f3gJc19g6iW2rn09n2w8="
     },
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@@ -1930,9 +1976,9 @@
       "integrity": "sha1-HQPd7VO9jbDzDCbk+V02/HyH3CQ="
     },
     "is-retry-allowed": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/is-retry-allowed/-/is-retry-allowed-1.1.0.tgz",
-      "integrity": "sha1-EaBgVotnM5REAz0BJaYaINVk+zQ="
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/is-retry-allowed/-/is-retry-allowed-1.2.0.tgz",
+      "integrity": "sha512-RUbUeKwvm3XG2VYamhJL1xFktgjvPzL0Hq8C+6yrWIswDy3BIXGqCxhxkc30N9jqK311gVU137K8Ei55/zVJRg=="
     },
     "is-stream": {
       "version": "1.1.0",
@@ -2011,9 +2057,9 @@
       "integrity": "sha512-/PpesirAIfaklxUzp4Yb7xBper9MwP6hNRA6BGGUFCgbJ+BM5CKBtsoxinNXkLHAr+GXS1/lSlF2rP7cv5Fl+g=="
     },
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diff --git a/package.json b/package.json
index 362b36e..ab4d8ec 100644
--- a/package.json
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