Bump eslint from 4.18.2 to 4.19.0 in /helpers/npm

Bumps [eslint](https://github.com/eslint/eslint) from 4.18.2 to 4.19.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v4.18.2...v4.19.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

helpers/npm/package.json

@@ -5,7 +5,7 @@
     "semver": "^5.5.0"
   },
   "devDependencies": {
-    "eslint": "^4.18.2",
+    "eslint": "^4.19.0",
     "eslint-plugin-prettier": "^2.6.0",
     "fs-extra": "^5.0.0",
     "jest": "^22.4.2",

helpers/npm/yarn.lock

@@ -45,10 +45,14 @@ acorn@^3.0.4:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-3.3.0.tgz#45e37fb39e8da3f25baee3ff5369e2bb5f22017a"
 
-acorn@^5.0.0, acorn@^5.1.2, acorn@^5.2.1:
+acorn@^5.0.0, acorn@^5.1.2:
   version "5.2.1"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.2.1.tgz#317ac7821826c22c702d66189ab8359675f135d7"
 
+acorn@^5.5.0:
+  version "5.5.3"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.5.3.tgz#f473dd47e0277a08e28e9bec5aeeb04751f0b8c9"
+
 agent-base@4, agent-base@^4.1.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.2.0.tgz#9838b5c3392b962bad031e6a4c5e1024abec45ce"
@@ -1012,9 +1016,9 @@ eslint-visitor-keys@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/eslint-visitor-keys/-/eslint-visitor-keys-1.0.0.tgz#3f3180fb2e291017716acb4c9d6d5b5c34a6a81d"
 
-eslint@^4.18.2:
-  version "4.18.2"
-  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.18.2.tgz#0f81267ad1012e7d2051e186a9004cc2267b8d45"
+eslint@^4.19.0:
+  version "4.19.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.19.0.tgz#9e900efb5506812ac374557034ef6f5c3642fc4c"
   dependencies:
     ajv "^5.3.0"
     babel-code-frame "^6.22.0"
@@ -1025,7 +1029,7 @@ eslint@^4.18.2:
     doctrine "^2.1.0"
     eslint-scope "^3.7.1"
     eslint-visitor-keys "^1.0.0"
-    espree "^3.5.2"
+    espree "^3.5.4"
     esquery "^1.0.0"
     esutils "^2.0.2"
     file-entry-cache "^2.0.0"
@@ -1047,18 +1051,19 @@ eslint@^4.18.2:
     path-is-inside "^1.0.2"
     pluralize "^7.0.0"
     progress "^2.0.0"
+    regexpp "^1.0.1"
     require-uncached "^1.0.3"
     semver "^5.3.0"
     strip-ansi "^4.0.0"
     strip-json-comments "~2.0.1"
     table "4.0.2"
     text-table "~0.2.0"
 
-espree@^3.5.2:
-  version "3.5.2"
-  resolved "https://registry.yarnpkg.com/espree/-/espree-3.5.2.tgz#756ada8b979e9dcfcdb30aad8d1a9304a905e1ca"
+espree@^3.5.4:
+  version "3.5.4"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-3.5.4.tgz#b0f447187c8a8bed944b815a660bddf5deb5d1a7"
   dependencies:
-    acorn "^5.2.1"
+    acorn "^5.5.0"
     acorn-jsx "^3.0.0"
 
 esprima@^3.1.3:
@@ -3490,6 +3495,10 @@ regex-cache@^0.4.2:
     is-equal-shallow "^0.1.3"
     is-primitive "^2.0.0"
 
+regexpp@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/regexpp/-/regexpp-1.0.1.tgz#d857c3a741dce075c2848dcb019a0a975b190d43"
+
 registry-auth-token@^3.0.1:
   version "3.3.2"
   resolved "https://registry.yarnpkg.com/registry-auth-token/-/registry-auth-token-3.3.2.tgz#851fd49038eecb586911115af845260eec983f20"