Disable haddock from CI build for GHC < 8.2

Author: Bodigrim

.github/workflows/haskell-ci.yml

@@ -279,7 +279,7 @@ jobs:
           ${CABAL} -vnormal check
       - name: haddock
         run: |
-          $CABAL v2-haddock --disable-documentation --haddock-all $ARG_COMPILER --with-haddock $HADDOCK $ARG_TESTS $ARG_BENCH all
+          if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then $CABAL v2-haddock --disable-documentation --haddock-all $ARG_COMPILER --with-haddock $HADDOCK $ARG_TESTS $ARG_BENCH all ; fi
       - name: unconstrained build
         run: |
           rm -f cabal.project.local

cabal.haskell-ci

@@ -1,2 +1,3 @@
 apt: zlib1g-dev
 tests: >= 7.4
+haddock: >= 8.2