Update pyupgrade requirement from ~=2.14 to ~=2.25

Updates the requirements on pyupgrade to permit the latest version.

Commits

277aa8f v2.25.0
af9a6c2 Merge pull request #523 from MarcoGorelli/revert-pep584-rewrite
1cf9aca revert pep584 rewrite
aaad686 v2.24.0
8eec501 Merge pull request #520 from adamchainz/issue_519_unittest_aliases
092642a Rewrite unittest deprecated aliases
53c9471 v2.23.3
e181970 Merge pull request #513 from asottile/async-unpack
548d21c can't splat async generators
6eaa2a7 cannot unpack async generators
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Limych / ha-iaquk

Update pyupgrade requirement from ~=2.14 to ~=2.25 #42