properly increase version number

Me releasing...Not doing such things often..

Author: Bixilon

settings.gradle.kts

@@ -10,5 +10,5 @@ pluginManagement {
 
 gradle.rootProject {
     group = "kotlin.graphics"
-    version = "0.9.9.1-12"
+    version = "0.9.9.1-15"
 }