Newer Rubocop throws style errors.

[AaronLasseigne]

13:44:54 - INFO - Inspecting Ruby code style of all files
Inspecting 66 files
....C..........................CC...............C.................

Offenses:

lib/active_interaction/concerns/missable.rb:44:7: C: Avoid the use of double negation (!!).
      !!filter(slug)
      ^
spec/active_interaction/errors_spec.rb:136:11: C: Use 2 spaces for indentation in a hash, relative to the first position after the preceding left parenthesis.
          errors: { models: { klass.name => { attributes: { attribute: {
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
spec/active_interaction/filter_spec.rb:5:7: C: Use nested module/class definitions instead of compact style.
class ActiveInteraction::TestFilter < ActiveInteraction::Filter; end
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
spec/active_interaction/i18n_spec.rb:76:9: C: Use 2 spaces for indentation in a hash, relative to the first position after the preceding left parenthesis.
        errors: { messages: {
        ^^^^^^^^^^^^^^^^^^^^^

66 files inspected, 4 offenses detected