feat: adjective comparsion

[noomorph]

1. Adds optional argument to declensionAdjective and declensionAdjectiveFlat, which allows to limit output for superlative (adj.sup.) and comparative (adj.comp.) adjectives and avoids tautological forms like najnajlěpšejši.
2. Updates test cases with the adj.comp. and adj.sup. instances.

[github-actions[bot]]

Pull Request Test Coverage Report for Build 7499624553

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.4%) to 94.983%

---

Totals
Change from base Build 7499557271:	0.4%
Covered Lines:	1527
Relevant Lines:	1602

---

💛 - Coveralls

[github-actions[bot]]

:tada: This PR is included in version 2.3.0 :tada:

The release is available on:

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

Your semantic-release bot :package::rocket: