Prepare next development version

Author: filiphr

gradle.properties

@@ -9,7 +9,7 @@ runGenerators = true
 
 pluginGroup = org.mapstruct
 pluginName = mapstruct-intellij
-pluginVersion = 1.8.0
+pluginVersion = 1.8.1-SNAPSHOT
 
 publishPluginId =
 publishUsername =