Not skipping node_modules directory

### Description
While scanning my node.js codebase, I could see it scan the node_modules directory as well, which is not necessary and time consuming.

### How To Reproduce

Snapshot 1: Codebase where node_modules was scanned


Snapshot 2: Codebase where `npm install` was not done (node_modules directory doesn't exist)

### Thoughts
This seems to be not working:
```
for child in resource.children(codebase):
if depth == 0 and child.name == 'node_modules':
continue
yield child
```

> For bug reports, it really helps us to know:

* What OS are you running on? (Windows/MacOS/Linux) - Windows 11
* What version of scancode-toolkit was used to generate the scan file? - v32.1.0-7-g4f49985c26
* What installation method was used to install/run scancode? (pip/source download/other) - source download