Draft: [#301] Update stackage resolver to one with GHC-8.10
Experimental draft MR to see how our CI will like GHC-8.10.
✅ Checklist for your Merge Request
Related changes (conditional)
Tests (see short guidelines)
- If I added new functionality, I added tests covering it.
- If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.