Write more tests

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• Apr 10, 2024, 7:12 PM UTC
• Apr 10 2024, 7:12 PM UTC
• Apr 10 2024 7:12 PM UTC
• 2024-04-10 7:12 PM UTC

Include tests from:

• https://github.com/wanasit/chrono
• https://hackage.haskell.org/package/fuzzy-time
• https://github.com/derhuerst/parse-human-relative-time
• https://www.npmjs.com/package/parse-messy-time
• https://github.com/fczbkk/parse-relative-time
• https://github.com/mike182uk/timestring
• https://github.com/Frezc/relative-time-expression
• https://github.com/cmaurer/relative.time.parser
• https://github.com/uutils/parse_datetime