feat: more flexible squared property read expression, fixes #643

[coveralls]

Pull Request Test Coverage Report for Build 5941470202

• 85 of 85 (100.0%) changed or added relevant lines in 9 files are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.4%) to 99.6%

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Files with Coverage Reduction	New Missed Lines	%
src/tokens/identifier-token.ts	4	50.0%
<!--	Total:	4		-->

Totals
Change from base Build 5912287453:	-0.4%
Covered Lines:	2238
Relevant Lines:	2242

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💛 - Coveralls

[github-actions[bot]]

:tada: This PR is included in version 10.9.0 :tada:

The release is available on:

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

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