Use features for codecov.

Author: MidasLamb

.github/workflows/coverage.yml

@@ -26,7 +26,7 @@ jobs:
         uses: actions-rs/[email protected]
         with:
           version: "0.15.0"
-          args: "-- --test-threads 1"
+          args: "--all-features -- --test-threads 1"
 
       - name: Upload to codecov.io
         uses: codecov/[email protected]