Fix deprecation warnings

[rofreg]

I believe this fixes all deprecation warnings when running with:

• latest redis gem
• latest activemodel gem
• latest Ruby (2.7.1)

You can reproduce these deprecation warnings by cloning the current repo, changing .ruby-version to 2.7.1, and running bundle exec rspec.

Also replaces #29 (bumping activesupport for a security update).

[aried3r]

Please add a changelog entry. I will then merge and try to release a new version soon. Thanks!

[rofreg]

Updated. Thank you for maintaining this gem, @aried3r! 🙂

[aried3r]

Hey! I took another look and I believe at least in the specs we should either leave the update_attributes(!) specs or make sure that update_attributes(!) is just an alias to update(!).

They were added here #27 and right now in this PR I believe we're duplicating specs and not actually testing the old methods anymore.

[aried3r]

That being said, I don't mind releasing a 4.x which removes the deprecated methods.

[rofreg]

Good catch, thank you! I've removed the original commit that updated the update_attributes! tests, and appended a new commit that merely silences the deprecation warnings while still running the same tests. (As you say, the gem should still test that the deprecated methods work, and they SHOULD raise deprecation warnings when they get called!)

[aried3r]

Awesome, thanks!