-j formats single quote instead of double

[LighghtEeloo]

For example:

{
    'nodes': [
        {
            'id': 0,
            'size': 1,
            'color': 'rgba(189,8,242,0.7)',
            'label': '/home/lighght/Yggdrasill/Hof/v8_clion/src/wasm/compilation-environment.h',
            'group': 'src/wasm',
            'x': 0.00318283616270964,
            'y': 0.002160306621951876
        }
    ]
}

The problem of this format is that it doesn't yield proper json outcome, i.e. it can't be parsed by python json.load().

An easy fix is to use json.dump() to write it.

python version: 3.9

[LighghtEeloo]

In fact the tool is great, and it helps me a lot. Thank you!
I've forked the repo and am currently trying to fix it.