v0.3.0

Release v0.3.0

* Permit only public keywords in `ApplicationForm.filter_params`
* Relax and tweak rubocop:
  * Prefer fixed indentation for multi-line arguments
  * Allow positional args on first line, keywords on next lines
  * Prefer consistent indent in array literals
  * Prefer indenting method chains relative to receiver
  * Allow skipping model validations