Also add clippy

Author: cecton

.github/workflows/rust.yml

@@ -39,7 +39,7 @@ jobs:
           if [ "$ver" = msrv ]; then
               ver=$(cargo metadata --format-version 1 --no-deps | \
                   jq -r '.packages[0].rust_version')
-              extra=(-c rustfmt)
+              extra=(-c rustfmt -c clippy)
           fi
           rustup toolchain install "$ver" --profile minimal --no-self-update "${extra[@]}"
           rustup default "$ver"