chore: Attach workspace in lib as expected

The git release script in tag raises an error:

    Error: open lib/drafter.js: no such file or directory

This looks like it is because workspace isn't attached inside lib

.circleci/config.yml

@@ -108,5 +108,5 @@ jobs:
       - checkout
       - run: git submodule update --recursive --init
       - attach_workspace:
-          at: .
+          at: lib
       - run: ./scripts/release.sh