⬆️ Update eslint to the latest version 🚀 (#250)

* chore(package): update eslint to version 4.18.0

* ⬆️ Generate lock file

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
     "babel-preset-stage-3": "~6.24.1",
     "codecov": "~3.0.0",
     "cross-env": "~5.1.1",
-    "eslint": "~4.17.0",
+    "eslint": "~4.18.0",
     "greenkeeper-lockfile": "~1.13.2",
     "hotdoc": "~0.7.2",
     "jest": "~21.2.1",

yarn.lock

@@ -1836,6 +1836,48 @@ eslint@~4.16.0:
     table "^4.0.1"
     text-table "~0.2.0"
 
+eslint@~4.18.0:
+  version "4.18.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-4.18.0.tgz#ebd0ba795af6dc59aa5cee17938160af5950e051"
+  dependencies:
+    ajv "^5.3.0"
+    babel-code-frame "^6.22.0"
+    chalk "^2.1.0"
+    concat-stream "^1.6.0"
+    cross-spawn "^5.1.0"
+    debug "^3.1.0"
+    doctrine "^2.1.0"
+    eslint-scope "^3.7.1"
+    eslint-visitor-keys "^1.0.0"
+    espree "^3.5.2"
+    esquery "^1.0.0"
+    esutils "^2.0.2"
+    file-entry-cache "^2.0.0"
+    functional-red-black-tree "^1.0.1"
+    glob "^7.1.2"
+    globals "^11.0.1"
+    ignore "^3.3.3"
+    imurmurhash "^0.1.4"
+    inquirer "^3.0.6"
+    is-resolvable "^1.0.0"
+    js-yaml "^3.9.1"
+    json-stable-stringify-without-jsonify "^1.0.1"
+    levn "^0.3.0"
+    lodash "^4.17.4"
+    minimatch "^3.0.2"
+    mkdirp "^0.5.1"
+    natural-compare "^1.4.0"
+    optionator "^0.8.2"
+    path-is-inside "^1.0.2"
+    pluralize "^7.0.0"
+    progress "^2.0.0"
+    require-uncached "^1.0.3"
+    semver "^5.3.0"
+    strip-ansi "^4.0.0"
+    strip-json-comments "~2.0.1"
+    table "^4.0.1"
+    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"