fix(.github): depend on specific tarpaulin version (#80)

General best practice and workaround for actions-rs/tarpaulin#15.

Author: mxinden

.github/workflows/build.yml

@@ -84,6 +84,7 @@ jobs:
       - name: Generate Code Coverage
         uses: actions-rs/[email protected]
         with:
+          version: 0.22.0
           args: --all-features
 
       - name: Upload Code Coverage