Do not open a PR if the repository doesn't use `package-lock`/`yarn.lock`

**What happened?**
This script is opening PR's independently if the repository is using `package-lock.json`/`yarn.lock.json` or not.

**What did you expect to happen?**
To not open a PR if the lock file is not in that repo.

**What the problem might be**
Missing logic to control this