Lint node in justfile

`node` is excluded from the worspace so `just` commands that use cargo
don't hit it.

As we did for the `just fmt` command make the `just lint` command lint
the `node` crate also.

justfile

@@ -16,6 +16,7 @@ check:
 # Lint everything.
 lint:
   cargo +$(cat ./nightly-version) clippy --workspace --all-targets --all-features -- --deny warnings
+  cd $REPO_DIR/node > /dev/null; cargo +$(cat ../nightly-version) clippy --all-targets --all-features -- --deny warnings
 
 # Run cargo fmt
 fmt: