Add lint

Author: owjs3901

.github/workflows/CI.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Build
         run: cargo check
       - name: Lint
-        run: cargo clippy --all-targets --all-features -- -D warnings
+        run: cargo clippy --all-targets --all-features -- -D warnings && cargo fmt --check
       - name: Test
         run: |
           # rust coverage issue