Support SimpleCov 1.0

[mateusdeap]

• Add an entry to CHANGELOG.md that links to this PR under the "main (unreleased)" heading.

Description

Adds support for SimpleCov 1.0 in development

I will abide by the code of conduct.

[JuanVqz]

LGTM.

There are some deprecations we are raising, probably we cannot fix yet because we are supporting old ruby versions, not that old like next_rails... but I didn't check.

test/test_helper.rb:19: three APIs simplecov 1.0 deprecates, so skunk.yml CI job now prints deprecation noise every run.

Reproduced under 1.0.3:

1. add_filter lines 19, 20 → Replace with SimpleCov.skip
2. track_files line 22 → Replace with SimpleCov.cover

[mateusdeap]

LGTM.

There are some deprecations we are raising, probably we cannot fix yet because we are supporting old ruby versions, not that old like next_rails... but I didn't check.

test/test_helper.rb:19: three APIs simplecov 1.0 deprecates, so skunk.yml CI job now prints deprecation noise every run.

I think that, since this is a development dependency, we can update it. Let me fix it up