Run testpack from strings-to-regex workspace

Author: wimpyprogrammer

.github/workflows/tests.yml

@@ -36,7 +36,9 @@ jobs:
       - run: yarn run build
       - run: yarn run lint
       - run: yarn run test
+
       - run: npx testpack-cli --keep=@types/jest,ts-jest,typescript src/e2e.spec.ts
+        working-directory: ./packages/strings-to-regex
 
       - name: Upload test coverage report to Codecov
         uses: codecov/codecov-action@v2.1.0