* Add Erlang/OTP 25+ (not RC) to tests
* Test a specific combo
And a strict version
* Allow testing "edge" cases
We weren't taking our own considerations into account for version strictness
We want to be able to test cases where we use -otp- (if the consumer is doing
it, at least they have to use _strict_ to assert their decision)
* Support more OTP+Windows versions (try to bridge the gap with gleam-lang/setup-erlang that seems to support pre-21 versions)
* Merge ci.yml and test.yml
* Add Elixir to the Windows mix
* Hopefully improve error/warning messages
* Adapt the doc.s to the current reality
* Add option version-type (loose by default, for compatibility)