Update semaphore-compat to 2.0.0.0 to fix #9993#11628

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wz1000 wants to merge 2 commits intohaskell:masterfrom

wz1000:wip/semaphore-v2

Commits on Mar 18, 2026

Update to semaphore-compat 2.0.0 fixing https://github.com/haskell/cabal/issues/9993 and https://gitlab.haskell.org/ghc/ghc/-/issues/25087
wz1000
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Commits on Mar 19, 2026

DROP me before merging: use source-repository-package for semaphore-compat 2.0.0
wz1000
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