build: enforce clippy

Co-authored-by: warren2k <[email protected]>

Author: mightyiam

.github/workflows/ci.yml

@@ -35,7 +35,8 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
-      - run: RUSTFLAGS="--deny warnings" cargo check ${{ matrix.features }}
+          components: ${{ matrix.rust == 'stable' && 'clippy' || '' }}
+      - run: RUSTFLAGS="--deny warnings" cargo ${{ matrix.rust == 'stable' && 'clippy' || 'check' }} ${{ matrix.features }}
 
   test:
     name: test