Increment version number

Secret-chest · Secret-chest · commit a47125c0d6f1 · 2022-02-26T07:39:49.000+02:00
diff --git a/main.py b/main.py
@@ -19,7 +19,7 @@
 along with this program.  If not, see <https://www.gnu.org/licenses/>.
 """
 
-__version__ = "M13 (development version)"
+__version__ = "M15 (development version)"
 __author__ = "Secret-chest"
 
 import platform
