fix: cargoTomlAggressive only keeps top-level keys

[benedikt-schaber]

Motivation

In #957 I introduced two filters:

filters.cargoTomlConservative
filters.cargoTomlAggressive

However, pretty much all attention went to filters.cargoTomlConservative since you mentioned that that should be the default. Sadly, I thus overlooked, that the implementation I provided for filters.cargoTomlAggressive only keeps the top-level keys and so fails with any non-trivial test case.
I fixed that and ensured that now all filters are tested with all cleanCargoTomlTests test cases.

Checklist

• added tests to verify new behavior
• added an example template or updated an existing one
• updated docs/API.md (or general documentation) with changes
• updated CHANGELOG.md

[benedikt-schaber]

@ipetkov I did not update the changelog, since the filters are still unreleased

[ipetkov]

Thanks for fixing this, sorry I missed it as well!

Yeah don't worry about the changelog I think its fine to omit an entry here