Bump version to v1.5.15-beta

Author: tier940

gradle.properties

@@ -7,7 +7,7 @@ modGroup = gtexpert
 
 # Version of your mod.
 # This field can be left empty if you want your mod's version to be determined by the latest git tag instead.
-modVersion = 1.5.14-beta
+modVersion = 1.5.15-beta
 
 # Whether to use the old jar naming structure (modid-mcversion-version) instead of the new version (modid-version)
 includeMCVersionJar = false