Make doctest build faster (no optimization)

.github/workflows/haskell.yml

@@ -207,7 +207,7 @@ jobs:
           rm -f cabal-docspec.xz
           chmod a+x $HOME/.cabal/bin/cabal-docspec
           cabal update
-          cabal build all
+          cabal build --project-file cabal.project.doctest all
           $HOME/.cabal/bin/cabal-docspec --version
           $HOME/.cabal/bin/cabal-docspec --timeout 60 --check-properties --property-variables xs
         elif test -z "$COVERAGE"

cabal.project.doctest

@@ -1,6 +1,8 @@
 packages:   streamly.cabal
           , core/streamly-core.cabal
           , docs/streamly-docs.cabal
+          -- for QuickCheck in property doctests
+          , test/streamly-tests.cabal
 
 -- Keep the flags same as cabal.project.O0 because we utilize the same build
 -- for doctest in CI.
@@ -16,3 +18,7 @@ package streamly-core
 package streamly-docs
   flags: -opt
   ghc-options: -O0 -Werror
+
+package streamly-tests
+  flags: -opt
+  ghc-options: -O0 -Werror