[BUG] Possible duplicate license for node projects

[anistark]

Describe the bug
There might be possible duplicate license getting detected while parsing the tree or while using pnpm.

To Reproduce
Steps to reproduce the behavior:

1. Run feluda on nodejs project
2. There's more licenses being scanned than listed in pnpm tree.

Expected behavior
The numbers should match or be close enough for resonable doubt.

Follow up from issue #93