Updated Kotlin to 1.3 due to compatibility IntelliJ 2019.1

The minimal compatible version is now 2018.3.

build.gradle

@@ -51,5 +51,4 @@ repositories {
 
 dependencies {
   compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion"
-  compile "org.jetbrains.kotlin:kotlin-runtime:$kotlinVersion"
 }

gradle.properties

@@ -1,9 +1,9 @@
-ideaVersion IC-2018.2.5
+ideaVersion IC-2018.3
 downloadIdeaSources true
 instrumentPluginCode true
 version SNAPSHOT
 javaVersion 1.8
-kotlinVersion 1.2.71
+kotlinVersion 1.3.11
 publishUsername username
 publishPassword password
 publishChannels eap

resources/META-INF/plugin.xml

@@ -50,7 +50,7 @@
   <version>SNAPSHOT</version>
   <vendor>JetBrains</vendor>
 
-  <idea-version since-build="181.0"/>
+  <idea-version since-build="183.0"/>
 
   <!-- Mark the plugin as compatible with RubyMine and other products based on the IntelliJ platform -->
   <depends>com.intellij.modules.lang</depends>