chore: standardise release method (#68)

- add standard-version
- add docs to show usage
- add hint to PR template to help contributors adhere to conventional commit spec for breaking changes

.github/pull_request_template.md

@@ -33,10 +33,9 @@ Please don't hesitate to [ask questions][issues] for clarification, or to [make
 delete everything above this line
 -------------------------------------------
 
+BREAKING CHANGE: description
 
-
-
-
+Does this PR contain a breaking change? If yes, please update this description on the line above to include a short description of the breaking change. If no, please delete this line and the line above.
 
 ## Description
 

CONTRIBUTING.md

@@ -166,3 +166,14 @@ gulp test-full  # run the test suite against all supported browsers (using Sauce
 ```
 
 Please note: in order to run tests in-browser (with `gulp test-local`), Chrome and Firefox should be installed locally. If you want to run `gulp test-full`, `SAUCE_USERNAME` and `SAUCE_ACCESS_KEY` must be defined in your shell.
+
+### Cutting a release
+
+Ensure all commits and PR titles are correctly described using the [Conventional Commits Specification](https://conventionalcommits.org/)
+
+```sh
+npm install # update dependencies to latest
+npm run release # build code, bump package version according to commit messages, and generate changelog
+git push --follow-tags origin master  # push to github and publish
+npm publish # publish to npm
+```