Enable cache for ESLint.

.eslintignore

@@ -2,3 +2,5 @@
 **/dist/
 **/vendor/
 /_gh_pages/
+/js/coverage/
+/package.js

package.js

@@ -1,9 +1,7 @@
 // package metadata file for Meteor.js
 
-/* eslint-env meteor */
-
 Package.describe({
-  name: 'twbs:bootstrap',  // https://atmospherejs.com/twbs/bootstrap
+  name: 'twbs:bootstrap', // https://atmospherejs.com/twbs/bootstrap
   summary: 'The most popular front-end framework for developing responsive, mobile first projects on the web.',
   version: '4.2.1',
   git: 'https://github.com/twbs/bootstrap.git'

package.json

@@ -50,8 +50,8 @@
     "js-compile-plugins": "node build/build-plugins.js",
     "js-compile-plugins-coverage": "cross-env NODE_ENV=test node build/build-plugins.js",
     "js-lint": "npm-run-all --parallel js-lint-*",
-    "js-lint-main": "eslint js/src js/tests build/",
-    "js-lint-docs": "eslint site/",
+    "js-lint-main": "eslint --cache --cache-location .cache/.eslintcache js/src js/tests build/",
+    "js-lint-docs": "eslint --cache --cache-location .cache/.eslintcache site/",
     "js-minify": "npm-run-all --parallel js-minify-main js-minify-docs",
     "js-minify-main": "npm-run-all js-minify-standalone js-minify-bundle",
     "js-minify-standalone": "uglifyjs --compress typeofs=false --mangle --comments \"/^!/\" --source-map \"content=dist/js/bootstrap.js.map,includeSources,url=bootstrap.min.js.map\" --output dist/js/bootstrap.min.js dist/js/bootstrap.js",