Update plum-dispatch requirement from >=2,<2.3 to >=2.4.4,<2.5

[dependabot[bot]]

Updates the requirements on plum-dispatch to permit the latest version.

Release notes

Sourced from plum-dispatch's releases.

v2.4.4

• Deprecate multihash (thanks @​nstarman!).
• Add type hints in various places. (also @​nstarman :)).

Commits

• 6531b99 Merge branch 'master' of github.com:wesselb/plum
• a161a5d Loosen test
• 595690e feat: type annotate signature.py (#172)
• 218e875 feat: type annotations for dispatcher.multi (#176)
• 0f5e573 feat: deprecate multihash (#175)
• 6c695e9 Extend test and resolve types in check
• 3292034 fix: warning on self promotion (#170)
• f41228d Fix spacing
• 22fd76f Fix syntax
• 6f836bd Fix typo
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #570.