Bump patch version to '2.1.2'

bb1df110 · Guillaume Poirier-Morency · d1d1d340 · bb1df110
Commit bb1df110 authored Apr 06, 2019 by Guillaume Poirier-Morency
--- a/meson.build
+++ b/meson.build
 project('mirbooking', 'c',
-        version: '2.1.1',
+        version: '2.1.2',
        default_options: 'c_std=gnu11')

 api_version = '2.1'