Sending a patch

If you'd like to send us a patch please make sure the following applies:

• There is a corresponding issue. If there is no issue yet, create one before sending a patch.
• Your commit log links to that issue.
• Your commit log is nicely written (use past commits as examples).
• Your patch introduces just one commit that can be rebased into the current master.
• You wrote appropriate unit tests for your code.
• All tests and lint checks pass (npm test and npm run-script lint).
• Make sure you know that we're super grateful for your patch.