Bumps to version 0.4.0

[jwg2s]

Developer Checklist

• I considered alternative approaches and chose the simplest one.
• I wrote unit/acceptance specs for these changes that test all possible conditions (success, failure, bad input, etc).
• I wrote unit/acceptance specs for code/functionality these changes may have affected.
• I can't think of any other code/functionality this may have affected that I didn't test or account for.
• I've ensured any necessary data migrations have been run.
• I've ensured other blocking code has been deployed (e.g. if part of a larger feature).
• We are able to track any changes to application performance or utilization introduced by this PR.

Deploying is blocked by:

• Nothing

[jwg2s]

Reviewed by @env