ci: don't fail fast

Author: nim65s

.github/workflows/test.yml

@@ -15,6 +15,7 @@ jobs:
     name: "Test ${{ matrix.pm }} on ${{ matrix.os }}"
     runs-on: "${{ matrix.os }}-latest"
     strategy:
+      fail-fast: false
       matrix:
         pm: ["pip", "conda", "nix"]
         os: ["ubuntu", "macos", "windows"]