Merge pull request #580 from nathanwhit/ci

Don't fail CI if only nightly fails

Author: jackh726

.github/workflows/ci.yml

@@ -11,6 +11,7 @@ jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.rust == 'nightly' }}
     strategy:
       matrix:
         rust: [stable, nightly]