Update to unlock climate_control dependency

[brian-penguin]

Why this change is being made:

• Climate control is on version 1.3 and I think it should be ready to support this out of the box. We can find out with our specs probably!
• Not sure we need the active support dependency to be locked either

What were the changes made to support this:

• Setup ruby 3.2 on CI as part of the matrix
• remove test_files from the gemspec (these are deprecated)
• Run Standard against the whole of the gemspec
• drop the version requirements

[brian-penguin]

this should replace https://github.com/thoughtbot/terrapin/pull/15

[thomasdarde]

It seams the most important change is on master already, will ask why no release has been done