ci: re-enable fail-fast

Author: montchr

.github/workflows/check.yml

@@ -11,8 +11,7 @@ jobs:
   check:
     runs-on: ${{ matrix.os }}
     strategy:
-      # TODO: re-enable fail-fast when darwin support is ready
-      fail-fast: false
+      fail-fast: true
       matrix:
         os: [ubuntu-latest, macos-latest]
     steps: