change version

Change from Dev Build 0.5.9 [1.21.3] to Release 0.5.9 [1.21.3]

Author: DequaviousBingleton

gradle.properties

@@ -13,4 +13,4 @@ archives_base_name=e621-addon
 # Dependency Versions.
 
 # Meteor (https://maven.meteordev.org/)
-meteor_version=0.5.9-SNAPSHOT
+meteor_version=0.5.9