Add array option support for have db column matcher

[shaggyone]

This pull request adds :array option support for have_db_column matcher.

Rails starting from 4.0 support array columns for postgresql and other databases.

shoulda matchers prior to 4.5.0 just ignored so it was passible to write
expect(...).to have_db_column(:tags).with_options(array: true). Check was not actually performed.

shoulda-matchers staring from 4.5.0 caused those specs to fail.

[shaggyone]

@mqgama could you checke the pull request, Please. I ran specs locally, I believe some kind of authorization required to run them in github actions.

[vsppedro]

Hi, @shaggyone, would you mind pushing the last commit again, please?

Just to check if this time the GithubActions will work properly.

Thanks!

[shaggyone]

@vsppedro pushed an empty commit. Nothing seem to happen.

[vsppedro]

Thanks! Before, the option to approve the CI execution was not appearing. It worked!

[shaggyone]

@vsppedro Great!

[vsppedro]

Thank you for your contribution!

[shaggyone]

@vsppedro not much, but surely useful for people, who use array columns ).