HGKeeper

55291fd09e7d

Bump the minimum meson to 0.61.0 and clean up some warnings

Testing Done:
Compiled.

Reviewed at https://reviews.imfreedom.org/r/1350/

EionRobb <> EionRobb <eion@robbmob.com>

ivanhoe <107501-ivanhoe@users.noreply.gitlab.com> ivanhoe <ivanhoe@fiscari.de>

Richard Laager <rlaager@pidgin.im> <rlaager@wiktel.com>