test(verbs): migrate to yaml

[noomorph]

This PR migrates verbs/testCases.json to verbs/testCases.yml (input) and verbs/__snapshots__/conjugationVerb.test.ts.snap (snapshotted output).

This migration should simplify maintenance when introducing controlled changes to the conjugation algorithm.

[coveralls]

Pull Request Test Coverage Report for Build 7912492981

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 94.983%

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Totals
Change from base Build 7512500563:	0.0%
Covered Lines:	1527
Relevant Lines:	1602

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💛 - Coveralls

[github-actions[bot]]

:tada: This PR is included in version 2.3.1 :tada:

The release is available on:

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

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