chore(ci): enable caching all crates and ignore coverage files (#38)

Author: billf

.github/workflows/test.yaml

@@ -26,6 +26,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           save-if: ${{ github.ref == 'refs/heads/master' }}
+          cache-all-crates: true
 
       - name: Install devenv.sh
         run: nix profile install nixpkgs#devenv

.gitignore

@@ -12,3 +12,5 @@ devenv.local.nix
 
 # pre-commit
 .pre-commit-config.yaml
+
+coverage.*