Replace npm references with yarn

.gitignore

@@ -9,4 +9,5 @@ dump.rdb
 node_modules/
 app/assets/webpack/app-bundle.js
 app/assets/webpack/vendor-bundle.js
-npm-debug.log
+yarn-debug.log*
+yarn-error.log*

Procfile

@@ -1,5 +1,5 @@
 web: bundle exec puma -C config/puma.rb
-client: sh -c 'rm app/assets/webpack/* || true && npm run build:watch'
+client: sh -c 'rm app/assets/webpack/* || true && yarn run build:watch'
 resque_high: env TERM_CHILD=1 RESQUE_TERM_TIMEOUT=8 QUEUE=high,medium bundle exec rake resque:work
 resque_medium: env TERM_CHILD=1 RESQUE_TERM_TIMEOUT=8 QUEUE=medium bundle exec rake resque:work
 resque_low: env TERM_CHILD=1 RESQUE_TERM_TIMEOUT=8 QUEUE=low,medium bundle exec rake resque:work

bin/setup

@@ -3,8 +3,8 @@
 # Set up Ruby
 bundle install
 
-# Install NPM modules
-npm install
+# Install Node modules
+yarn
 
 # Add binstubs to PATH via export PATH=".git/safe/../../bin:$PATH" in ~/.zshenv
 mkdir -p .git/safe

lib/tasks/js.rake

@@ -1,5 +1,5 @@
 namespace :js do
   task spec: "webpack:build" do
-    sh "npm run test"
+    sh "yarn run test"
   end
 end

lib/tasks/webpack.rake

@@ -1,6 +1,6 @@
 namespace :webpack do
   desc "Build the asset bundle with Webpack"
   task :build do
-    sh "npm run build"
+    sh "yarn run build"
   end
 end

package.json

@@ -11,7 +11,7 @@
   },
   "engines": {
     "node": "7.4",
-    "npm": "4.0.5"
+    "yarn": "^0.14.0"
   },
   "dependencies": {
     "autoprefixer": "^6.3.2",