gplugin/gplugin

Bump the glib requirement to 2.70

2021-12-27, Gary Kramlich
c97d5cc32a14
Bump the glib requirement to 2.70

Testing Done:
Compiled and ran the unit tests.

Reviewed at https://reviews.imfreedom.org/r/1199/
EionRobb <> EionRobb <eion@robbmob.com>
ivanhoe <107501-ivanhoe@users.noreply.gitlab.com> ivanhoe <ivanhoe@fiscari.de>
Richard Laager <rlaager@pidgin.im> <rlaager@wiktel.com>