Support negative look behind

[rommguy]

trafficstars

Thank you very much for this excellent tool! I love using it, it really helps

I saw I can't use the negative look behind syntax ?<! Can you please add support for that?

Example - find all strings 'py' that are not prefixed by 'co' /(?<!co)py/

Thanks

[CJex]

This is feature is coming soon

[careteenL]

This is feature is coming soon

We need you !

[liudongmiao]

demo: https://jianyu.io/regulex/