Adds badges to readme

Also adds a prepublish script as this is v0.9.0 now!

README.md

@@ -1,4 +1,5 @@
-## :flags: git-labelmaker [![Join the chat at https://gitter.im/himynameisdave/git-labelmaker](https://badges.gitter.im/himynameisdave/git-labelmaker.svg)](https://gitter.im/himynameisdave/git-labelmaker?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+## :flags: git-labelmaker
+ [![travis-build-badge](https://api.travis-ci.org/himynameisdave/git-labelmaker.svg?branch=master)](https://travis-ci.org/himynameisdave/git-labelmaker) [![Coverage Status](https://coveralls.io/repos/github/himynameisdave/git-labelmaker/badge.svg?branch=master)](https://coveralls.io/github/himynameisdave/git-labelmaker?branch=master) [![Join the chat at https://gitter.im/himynameisdave/git-labelmaker](https://badges.gitter.im/himynameisdave/git-labelmaker.svg)](https://gitter.im/himynameisdave/git-labelmaker?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 Edit GitHub labels from the command line using **`git-labelmaker`**! You can easily add or remove GitHub labels, making it easier for your projects to adhere to a [sane labelling](https://medium.com/@dave_lunny/sane-github-labels-c5d2e6004b63) scheme.
 
@@ -7,6 +8,10 @@ Edit GitHub labels from the command line using **`git-labelmaker`**! You can eas
 Install `git-labelmaker` globally:
 
 ```
+yarn global add git-labelmaker
+
+OR
+
 npm i -g git-labelmaker
 ```
 

package.json

@@ -8,7 +8,8 @@
     "test": "jest --verbose --coverage --no-cache",
     "test-coverage": "jest --coverage && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js",
     "lint": "eslint ./bin/ --no-cache",
-    "precommit": "npm run lint && npm run test"
+    "precommit": "npm run lint && npm run test",
+    "prepublish": "npm run lint && npm run test"
   },
   "repository": {
     "type": "git",