ci: assert Cargo.lock is up-to-date (#140)

Author: branchseer

.github/workflows/ci.yml

@@ -59,7 +59,7 @@ jobs:
       - run: pip install cargo-zigbuild
         if: ${{ matrix.os == 'ubuntu-latest' }}
 
-      - run: cargo check --all-targets --all-features --target ${{ matrix.target }}
+      - run: cargo check --locked --all-targets --all-features --target ${{ matrix.target }}
         env:
           RUSTFLAGS: '-D warnings --cfg tokio_unstable' # also update .cargo/config.toml