Remove brittle version bound on filepath; replace with another more robust solution

Author: tbagrel1

.github/workflows/ci.yaml

@@ -37,7 +37,7 @@ jobs:
     - name: Build
       run: nix-shell --arg ghcVersion '"${{ matrix.ghc-version }}"' --arg installHls 'false' --pure --run "cabal build"
     - name: Haddock
-      run: nix-shell --arg ghcVersion '"${{ matrix.ghc-version }}"' --arg installHls 'false' --pure --run "cabal haddock --allow-newer"
+      run: nix-shell --arg ghcVersion '"${{ matrix.ghc-version }}"' --arg installHls 'false' --pure --run "cabal haddock"
     - name: cabal-docspec
       run: nix-shell --arg ghcVersion '"${{ matrix.ghc-version }}"' --arg installHls 'false' --pure --run "cabal-docspec"
     - name: Build benchmarks

cabal.project

@@ -1,11 +1,6 @@
 packages: *.cabal
 
-tests: False
-benchmarks: False
+tests: True
+benchmarks: True
 allow-newer: all
 index-state: 2024-09-13T13:31:57Z
-
--- But as of 2024-09-11, the latest version of the `unix` 2.8.5.1 package has a conditional bound on `filepath` depending on the `os-string` flag (see https://hackage.haskell.org/package/unix-2.8.5.1/dependencies).
--- With no extra parameter or setting, we get a dependency conflict on `filepath`, as other libs use a version of `filepath` incompatible with the one `unix` wants.
--- Setting `filepath` to 1.4.2.2 fixes that.
-constraints: filepath ==1.4.2.2