stack, ci: the real fix for failing ghc 8.2 & CI

.github/workflows/linux.yml

@@ -77,9 +77,9 @@ jobs:
       uses: actions/cache@v2
       with:
         path: ~/.stack
-        key: ${{ runner.os }}-stack-global-${{ matrix.plan.ghc }}-2-${{ hashFiles('**.yaml') }}
+        key: ${{ runner.os }}-stack-global-${{ matrix.plan.ghc }}-${{ hashFiles('**.yaml') }}
         restore-keys: |
-             ${{ runner.os }}-stack-global-${{ matrix.plan.ghc }}-2
+             ${{ runner.os }}-stack-global-${{ matrix.plan.ghc }}
 
     - name: Cache stack-installed programs in ~/.local/bin
       id:   stack-programs

stack8.2.yaml

@@ -36,7 +36,6 @@ extra-deps:
 - fsnotify-0.3.0.1
 - tasty-1.2.3
 - tasty-hunit-0.10.0.2
-- ansi-terminal-0.10.2
 - wcwidth-0.0.2
 - ansi-wl-pprint-0.6.9
 - wai-handler-launch-3.0.3.1