v6.0.0 bump rubocop to 1.32.0, drop ruby2.5 (#194)

Cut release for 5.0.0 (#192)

Merge pull request #165 from airbnb/zs--bump-version

Bump version to 3.0.1

2.0.0 release of RuboCop Airbnb

1.5.0 release of RuboCop Airbnb

1.4.0 release of RuboCop Airbnb

1.3.0 release of RuboCop Airbnb

Initial public release of RuboCop Airbnb