Resolve "Harmonize prettier and eslint configs"

spec/javascripts/new_branch_spec.js

-/* eslint-disable one-var, no-var, one-var-declaration-per-line, no-return-assign, quotes, max-len */
+/* eslint-disable one-var, no-var, no-return-assign */
 import $ from 'jquery';
 import NewBranchForm from '~/new_branch_form';

spec/javascripts/right_sidebar_spec.js

-/* eslint-disable no-var, one-var, one-var-declaration-per-line, no-return-assign, vars-on-top, jasmine/no-unsafe-spy, max-len */
+/* eslint-disable no-var, one-var, no-return-assign, vars-on-top, jasmine/no-unsafe-spy */
 import $ from 'jquery';
 import MockAdapter from 'axios-mock-adapter';

spec/javascripts/search_autocomplete_spec.js

-/* eslint-disable max-len, no-var, one-var, one-var-declaration-per-line, no-unused-expressions, consistent-return, no-param-reassign, default-case, no-return-assign, object-shorthand, prefer-template, vars-on-top, max-len */
+/* eslint-disable no-var, one-var, no-unused-expressions, consistent-return, no-param-reassign, default-case, no-return-assign, object-shorthand, prefer-template, vars-on-top */
 import $ from 'jquery';
 import '~/gl_dropdown';

spec/javascripts/syntax_highlight_spec.js

-/* eslint-disable no-var, no-return-assign, quotes */
+/* eslint-disable no-var, no-return-assign */
 import $ from 'jquery';
 import syntaxHighlight from '~/syntax_highlight';

spec/javascripts/u2f/mock_u2f_device.js

-/* eslint-disable wrap-iife, no-unused-expressions, no-return-assign, no-param-reassign */
+/* eslint-disable no-unused-expressions, no-return-assign, no-param-reassign */
 export default class MockU2FDevice {
   constructor() {

yarn.lock

@@ -3012,6 +3012,13 @@ eslint-config-airbnb-base@^13.1.0:
     object.assign "^4.1.0"
     object.entries "^1.0.4"
+eslint-config-prettier@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-prettier/-/eslint-config-prettier-3.1.0.tgz#2c26d2cdcfa3a05f0642cd7e6e4ef3316cdabfa2"
+  integrity sha512-QYGfmzuc4q4J6XIhlp8vRKdI/fI0tQfQPy1dME3UOLprE+v4ssH/3W9LM2Q7h5qBcy5m0ehCrBDU2YF8q6OY8w==
+  dependencies:
+    get-stdin "^6.0.0"
+
 eslint-import-resolver-node@^0.3.1:
   version "0.3.2"
   resolved "https://registry.yarnpkg.com/eslint-import-resolver-node/-/eslint-import-resolver-node-0.3.2.tgz#58f15fb839b8d0576ca980413476aab2472db66a"
@@ -3708,6 +3715,11 @@ get-caller-file@^1.0.1:
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-1.0.2.tgz#f702e63127e7e231c160a80c1554acb70d5047e5"
   integrity sha1-9wLmMSfn4jHBYKgMFVSstw1QR+U=
+get-stdin@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-6.0.0.tgz#9e09bf712b360ab9225e812048f71fde9c89657b"
+  integrity sha512-jp4tHawyV7+fkkSKyvjuLZswblUtz+SQKzSWnBbii16BuZksJlU1wuBYXY75r+duh/llF1ur6oNwi+2ZzjKZ7g==
+
 get-stream@3.0.0, get-stream@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-3.0.0.tgz#8e943d1358dc37555054ecbe2edb05aa174ede14"
@@ -6271,16 +6283,16 @@ prepend-http@^2.0.0:
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-2.0.0.tgz#e92434bfa5ea8c19f41cdfd401d741a3c819d897"
   integrity sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc=
-prettier@1.12.1:
-  version "1.12.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.12.1.tgz#c1ad20e803e7749faf905a409d2367e06bbe7325"
-  integrity sha1-wa0g6APndJ+vkFpAnSNn4Gu+cyU=
-
 prettier@1.13.7:
   version "1.13.7"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.7.tgz#850f3b8af784a49a6ea2d2eaa7ed1428a34b7281"
   integrity sha512-KIU72UmYPGk4MujZGYMFwinB7lOf2LsDNGSOC8ufevsrPLISrZbNJlWstRi3m0AMuszbH+EFSQ/r6w56RSPK6w==
+prettier@1.14.3:
+  version "1.14.3"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.14.3.tgz#90238dd4c0684b7edce5f83b0fb7328e48bd0895"
+  integrity sha512-qZDVnCrnpsRJJq5nSsiHCE3BYMED2OtsI+cmzIzF1QIfqm5ALf8tEJcO27zV1gKNKRPdhjO0dNWnrzssDQ1tFg==
+
 prismjs@^1.6.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.6.0.tgz#118d95fb7a66dba2272e343b345f5236659db365"