Support GHC 9.10 (base 4.20)

[ulysses4ever]

Would it be possible to get the latest filepath on Hackage build with GHC 9.10? I'm trying alpha3 of 9.10 and filepath doesn't allow base 4.20, at least. This blocks Cabal as its test suite depends on filepath in non-trivial way, so that a simple allow-newer: filepath:base doesn't cut it.

[hasufell]

• revision: https://hackage.haskell.org/package/filepath-1.5.2.0/revisions/
• new release: https://hackage.haskell.org/package/filepath-1.4.300.2
• new release: https://hackage.haskell.org/package/os-string-2.0.2.1