Bump patch version to '2.2.1'

bd3ef6fb · Guillaume Poirier-Morency · c146e9e2 · bd3ef6fb
Commit bd3ef6fb authored Jul 02, 2019 by Guillaume Poirier-Morency
--- a/meson.build
+++ b/meson.build
 project('mirbooking', 'c',
-        version: '2.2.0',
+        version: '2.2.1',
        default_options: 'c_std=gnu11',
        meson_version: '>=0.46.0')