Update .gitignore

.gitignore

@@ -1,6 +1,6 @@
 # Parts of this file were adapted from
 # GitHub’s collection of .gitignore file templates
-# which are Copyright (c) 2016 GitHub, Inc.
+# which are Copyright (c) 2017 GitHub, Inc.
 # and released under the MIT License.
 # For more details, visit the project page:
 # https://github.com/github/gitignore
@@ -16,32 +16,57 @@ public
 logs
 *.log
 npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
 
 # Runtime data
 pids
 *.pid
 *.seed
+*.pid.lock
 
 # Directory for instrumented libs generated by jscoverage/JSCover
 lib-cov
 
 # Coverage directory used by tools like istanbul
 coverage
 
+# nyc test coverage
+.nyc_output
+
 # Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
 .grunt
 
+# Bower dependency directory (https://bower.io/)
+bower_components
+
 # node-waf configuration
 .lock-wscript
 
 # Compiled binary addons (http://nodejs.org/api/addons.html)
 build/Release
 
-# Dependency directory
-node_modules
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
 
 # Optional npm cache directory
 .npm
 
+# Optional eslint cache
+.eslintcache
+
 # Optional REPL history
 .node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env