Bump version to 4.1.6-SNAPSHOT

Author: boris-petrov

gradle.properties

@@ -6,7 +6,7 @@ developerId = gretty-gradle-plugin
 developerName = Andrey Hihlovskiy
 license = MIT
 group = org.gretty
-version = 4.1.5
+version = 4.1.6-SNAPSHOT
 jetty11_version = 11.0.17
 jetty11_servlet_api_version = 5.0.0
 tomcat10_version = 10.1.19