Add support for activesupport 7

[scottyp-env]

It's not causing us a problem right now, presumably because one of the other gems is doing this require 'active_support'. But if that ever changes a future dev is going to get a surprise so let's keep things nice for ourselves.

[orien]

What's changed in version 7 that requires this new require?

[ricobl]

What's changed in version 7 that requires this new require?

It's suggested here @orien:

https://guides.rubyonrails.org/active_support_core_extensions.html#stand-alone-active-support

Core extensions cannot be directly required anymore, instead it needs minimum dependencies to be loaded via require 'activesupport'.

Here's how a traceback can look like:

NameError: uninitialized constant ActiveSupport::XmlMini::IsolatedExecutionState
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/xml_mini.rb:184:in `current_thread_backend'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/xml_mini.rb:103:in `backend='
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/xml_mini.rb:201:in `<module:ActiveSupport>'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/xml_mini.rb:11:in `<top (required)>'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/core_ext/array/conversions.rb:3:in `require'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/core_ext/array/conversions.rb:3:in `<top (required)>'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/duration.rb:3:in `require'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/duration.rb:3:in `<top (required)>'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/core_ext/time/calculations.rb:3:in `require'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/core_ext/time/calculations.rb:3:in `<top (required)>'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/core_ext/string/conversions.rb:4:in `require'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/core_ext/string/conversions.rb:4:in `<top (required)>'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/core_ext/string.rb:3:in `require'
/usr/local/bundle/gems/activesupport-7.0.1/lib/active_support/core_ext/string.rb:3:in `<top (required)>'
# ...

[ricobl]

Thanks for this @scottyp-env!