Bump patch version to '2.1.3'

307a1287 · Guillaume Poirier-Morency · 7ad1913d · 307a1287
Commit 307a1287 authored Jul 02, 2019 by Guillaume Poirier-Morency
--- a/meson.build
+++ b/meson.build
 project('mirbooking', 'c',
-        version: '2.1.2',
+        version: '2.1.3',
        default_options: 'c_std=gnu11')

 api_version = '2.1'