v4.5.0

Simplifies the usage of annotations on routes.
Now you can pass annotations to a route as below.

...

annotation Test
end

get "/annotation/single", :single_annotation, annotations: @[Test(detail: "single")] do
  render text: {{ @def.annotations(ActionController::TestAnnotation).id.stringify }}
end

get "/annotation/multi", :multi_annotation, annotations: [@[Test], @[Test(detail: "multi"]] do
  render text: {{ @def.annotations(ActionController::TestAnnotation).id.stringify }}
end

...

Included

• Fixup the version matrix in CI
• Add tests for multithreading (use the ubuntu crystal image, as alpine does not support multithreading)
• Use the ameba action in CI
• Tidy up base.cr with the use of the delegate macro
• A few clarifications to comments
• Fix the log formatter to show the level key before rendering the level, in line with other log metadata