Travis: use 8.2.1 to compile configurations with expensive asserts.

Author: 23Skidoo

.travis.yml

@@ -51,10 +51,10 @@ matrix:
      sudo: required
      os: linux
 
-   - env: GHCVER=8.0.2 SCRIPT=solver-debug-flags USE_GOLD=YES
+   - env: GHCVER=8.2.1 SCRIPT=solver-debug-flags USE_GOLD=YES
      sudo: required
      os: linux
-   - env: GHCVER=8.0.2 SCRIPT=script DEBUG_EXPENSIVE_ASSERTIONS=YES TAGSUFFIX="-fdebug-expensive-assertions" USE_GOLD=YES
+   - env: GHCVER=8.2.1 SCRIPT=script DEBUG_EXPENSIVE_ASSERTIONS=YES TAGSUFFIX="-fdebug-expensive-assertions" USE_GOLD=YES
      os: linux
      sudo: required
    - env: GHCVER=8.0.2 SCRIPT=bootstrap USE_GOLD=YES