Exclude all ENV

[koekaverna]

Hi, @glensc , first of all thank you for supporting this package <3

In my project i need to exclude all $_ENV, there is few thousands of secrets.
Actualy this meta.env not used in xhgui UI.

Can we add some flag to not export this envs in ProfilingData::getProfilingData ?
Like profiler.exclude-all-env: bool ?
Or maybe check profiler.exclude-env is true - exclude all instead of list?

I can make PR.

[glensc]

So make it then. No need to ask permission!