Depreciations as Errors

[multimokia]

Over a quick glance in the checks, I didn't see anything that would flag the use of deprecated functions as errors.

In the upcoming renpy 8 release, all depreciated functions will be entirely removed. Thus it might be useful for the script to report depreciations as errors on a renpy 8 build.

[dreamscached]

Got it, will implement asap along with custom Ren'Py version.