Merge pull request #154 from haskell/mtl-2.3

Allow mtl-2.3

.github/workflows/haskell-ci.yml

@@ -259,3 +259,11 @@ jobs:
         run: |
           rm -f cabal.project.local
           $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
+      - name: prepare for constraint sets
+        run: |
+          rm -f cabal.project.local
+      - name: constraint set mtl-2.3
+        run: |
+          if [ $((HCNUMVER >= 80600)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --enable-tests --disable-benchmarks --constraint='mtl ^>=2.3' --dependencies-only -j2 all ; fi
+          if [ $((HCNUMVER >= 80600)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --enable-tests --disable-benchmarks --constraint='mtl ^>=2.3' all ; fi
+          if [ $((HCNUMVER >= 80600)) -ne 0 ] ; then $CABAL v2-test $ARG_COMPILER --enable-tests --disable-benchmarks --constraint='mtl ^>=2.3' all ; fi

cabal.haskell-ci

 branches: master
+
+constraint-set mtl-2.3
+  ghc: >=8.6
+  constraints: mtl ^>=2.3
+  tests: True
+  run-tests: True

parsec.cabal

 cabal-version:  1.12
 name:           parsec
-version:        3.1.15.0
+version:        3.1.15.1
 
 synopsis:       Monadic parser combinators
 description:    Parsec is designed from scratch as an industrial-strength parser
@@ -65,7 +65,7 @@ library
 
     build-depends:
         base       >= 4.5.1.0 && < 4.18,
-        mtl        >= 2.1.3.1 && < 2.3,
+        mtl        >= 2.1.3.1 && < 2.4,
         bytestring >= 0.9.2.1 && < 0.12,
         text      (>= 1.2.3.0  && < 1.3)
                || (>= 2.0 && < 2.1)