rewtguy/pidgin

bump the minimum meson to 0.56.0 and fix the deprecations

2021-07-27, Gary Kramlich
9e5a5eb54a57
bump the minimum meson to 0.56.0 and fix the deprecations

Testing Done:
Verfied meson didn't complain about any deprecations.

Reviewed at https://reviews.imfreedom.org/r/843/
For information on translating Pidgin, libpurple, and Finch, please see
our wiki page at https://developer.pidgin.im/wiki/TipsForTranslators