Extend CLI for older req.

What's Changed

• CLI: replace min dependencies also in pyproject.toml by @Borda in #414
• switch CLI from fire to jsonargparse by @Borda in #371
• CI: make timeout configurable for install jobs in check-package.yml by @Borda in #412
• CI: relax markdown-link-check by @Borda in #416
• CI: simplify internal testing workflow by @Borda in #415
• fix: correct regex in adjust to match library names at line start only by @Borda in #411
• fix standalone script w/ coverage by @Borda in #391
• reorder type checking for collections in _apply_to_collection_slow by @fschlatt in #406

New Contributors

• @fschlatt made their first contribution in #406

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Full Changelog: v0.14.2...v0.15.0