MM-9982 Switched to npm (mattermost#1102)

* MM-9982 Switched to npm

* Updated jest

* Removed reference to yarn from end-to-end tests

.gitignore

@@ -1,4 +1,5 @@
 dist
+.npminstall
 .yarninstall
 node_modules
 *.swp

Makefile

@@ -3,21 +3,20 @@
 BUILD_SERVER_DIR = ../mattermost-server
 EMOJI_TOOLS_DIR = ./build/emoji
 
-check-style: .yarninstall ## Checks JS file for ESLint confirmity
+check-style: .npminstall ## Checks JS file for ESLint confirmity
  @echo Checking for style guide compliance
 
- yarn run check
+ npm run check
 
-test: .yarninstall ## Runs tests
+test: .npminstall ## Runs tests
  @echo Running jest unit/component testing
 
- yarn run test
+ npm run test
 
-.yarninstall: package.json
- @echo Getting dependencies using yarn
-
- yarn cache clean --pattern "mattermost-redux"
- yarn install --pure-lockfile
+.npminstall: package.json package-lock.json
+ @echo Getting dependencies using npm
+
+ npm install
  cd node_modules/mattermost-redux; npm run build
 
  touch $@
@@ -31,22 +30,22 @@ package: build ## Packages app
  mv tmp/client dist
  rmdir tmp
 
-build: .yarninstall ## Builds the app
+build: .npminstall ## Builds the app
  @echo Building mattermost Webapp
 
  rm -rf dist
 
- yarn run build
+ npm run build
 
-run: .yarninstall ## Runs app
+run: .npminstall ## Runs app
  @echo Running mattermost Webapp for development
 
- yarn run run &
+ npm run run &
 
-run-fullmap: .yarninstall ## Runs the app with the JS mapped to source (good for debugger)
+run-fullmap: .npminstall ## Runs the app with the JS mapped to source (good for debugger)
  @echo FULL SOURCE MAP Running mattermost Webapp for development FULL SOURCE MAP
 
- yarn run run-fullmap &
+ npm run run-fullmap &
 
 stop: ## Stops webpack
  @echo Stopping changes watching
@@ -65,11 +64,9 @@ restart: | stop run ## Restarts the app
 clean: ## Clears cached; deletes node_modules and dist directories
  @echo Cleaning Webapp
 
- yarn cache clean
-
  rm -rf dist
  rm -rf node_modules
- rm -f .yarninstall
+ rm -f .npminstall
 
 emojis: ## Creates emoji JSX file and extracts emoji images from the system font
  gem install bundler