fix: apply type filter before computing exit code

[aarlaud]

• [x] Tests written and linted ℹ︎
• [ ] Documentation written ℹ︎
• [x] Commit history is tidy ℹ︎

What this does

Fixes the issue type filter that was ignored in the exit code computation. Also fixing a exit code mock issue in test.

[aarlaud]

:tada: This PR is included in version 1.8.1 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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