Update test.yml

.github/workflows/test.yml

@@ -47,6 +47,9 @@ jobs:
           override: true
           components: rustfmt
       - uses: Swatinem/rust-cache@v2
+      - uses: actions-rs/cargo@v1
+        with:
+          command: build
       - uses: actions-rs/cargo@v1
         with:
           command: fmt