Update contributing doc (#1)

* Add steps for updating VRT version

* Only display build status badge for master builds

* Add more detailed release plan

Author: adamrdavid

CONTRIBUTING.md

@@ -5,3 +5,17 @@ Bugcrowd welcomes community feedback and direct contributions to the Bugcrowd VR
 Please open your feedback as an **Issue** and label it as either a `bug` or an `enhancement`. Large or systemic changes should first be discussed in an Issue rather than be submitted as a pull request directly.
 
 Prior to opening a pull request please ensure your suggested changes pass specs. The repository uses [`rspec`](https://github.com/rspec/rspec) for spec running, run it with `bundle install && bundle exec rspec`.
+
+### Updating the VRT version
+When a new version of the VRT is released, we follow these steps:
+1. Add new submodule of the new version tag
+    - `git submodule add [email protected]:bugcrowd/vulnerability-rating-taxonomy.git lib/data/X.X`
+    - `cd lib/data/X.X`
+    - `git checkout vX.X`
+2. Cut new version of the gem
+    - update Vrt::VERSION
+    - `rake build`
+3. Push new version to rubygems
+    - `gem push OUTPUT_OF_RAKE_BUILD`
+4. Update dependent applications
+    - `bundle update vrt`

README.md

@@ -3,7 +3,7 @@
 </p>
 <p align="center">
   <img src="https://badge.fury.io/rb/vrt.svg" />
-  <img src="https://badge.buildkite.com/96e360e0465da5f781829145aad202ebbdf3f8e7d296501c87.svg" />
+  <img src="https://badge.buildkite.com/96e360e0465da5f781829145aad202ebbdf3f8e7d296501c87.svg?branch=master" />
 </p>
 
 # VRT Ruby Wrapper