Bump version from 0.2.2 to 0.3.0

Author: demonolock

setup.py

@@ -4,7 +4,7 @@
     from distutils.core import setup
 
 setup(
-    version='0.2.2',
+    version='0.3.0',
     name='testgres_pg_probackup2',
     packages=['pg_probackup2', 'pg_probackup2.storage'],
     description='Plugin for testgres that manages pg_probackup2',