Update .gitignore

Author: AlexProgrammerDE

.gitignore

@@ -14,6 +14,7 @@ target/*
 *.plantuml
 
 # Gradle
+.kotlin
 .gradle
 **/build/
 !src/**/build/
@@ -25,4 +26,4 @@ gradle-app.setting
 !gradle-wrapper.jar
 
 # Cache of project
-.gradletasknamecache
+.gradletasknamecache