feat: Make non-strict mode faster for classes. Addresses #1071

[mweststrate]

• [x]: fix tests. Maybe introduce additional flag as this might be dangerous for classes.
• [x]: can we optimize each / finalize based on the same setting? See #1120
• [x]: make a tristate flag? !strict is very unsafe for classes

[coveralls]

Pull Request Test Coverage Report for Build 8862180750

Details

• 21 of 21 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.001%) to 99.794%

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Totals
Change from base Build 8861675542:	0.001%
Covered Lines:	649
Relevant Lines:	650

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💛 - Coveralls

[github-actions[bot]]

:tada: This PR is included in version 10.1.0 :tada:

The release is available on:

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

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