`-x` argument to follow sourced files

[v1s1t0r1sh3r3]

Hi, I'm using version 0.1.4 on Pycharm 2019.2 and shellcheck 0.7.0

It is marking some vars as they are not being used (SC2034) as shown below

That's not completely true. They are sued in other file added using source statement:

I'm using the correct shellcheck syntax in order to avoid the errors when I launch shellcheck from console with the -x argument which makes the follow to sourced files.

Could be possible to add this shellcheck -x feauture to the plugin in order to avoid this false positives?

Thanks so much and congratz for the plugin, is very handy!