Merge pull request #304 from zendesk/cgoddard/af-1656-things-that-go-bump-in-the-build

[AF-1656] Articulate how to safely bump ZAT

Author: Christopher Goddard

README.md

@@ -30,6 +30,11 @@ Then, comment-out the line referring to `zendesk_apps_support` in this project's
 
 The path should point to your local ZAS directory. In this way, your clone of ZAT will use a local version of ZAS, which is very helpful for development. Run a `bundle install` after changing the Gemfile.
 
+## Deploy ZAT
+
+* To bump ZAT version, run `bump patch|minor|major --no-bundle` from the root directory. **Note:** `--no-bundle` is required in order to prevent `bundle update` command from running, which is by default triggered by the [bump](https://github.com/gregorym/bump) gem and could lead to incompatible dependencies.
+* To publish ZAT to [Rubygems](https://rubygems.org/gems/zendesk_apps_tools), run `bundle exec rake release`.
+
 ## Testing
 This project uses rspec, which you can run with `bundle exec rake`.