Bump base IntelliJ version and Kotlin version

Also enabled `updateSinceUntilBuild`

Author: DenWav

build.gradle.kts

@@ -21,7 +21,7 @@ buildscript {
 }
 
 plugins {
-    id("org.jetbrains.kotlin.jvm") version "1.1.3-2" // kept in sync with IntelliJ's bundled dep
+    id("org.jetbrains.kotlin.jvm") version "1.1.4-3" // kept in sync with IntelliJ's bundled dep
     groovy
     idea
     id("org.jetbrains.intellij") version "0.2.17"
@@ -112,7 +112,7 @@ intellij {
         "properties", "junit")
 
     pluginName = "Minecraft Development"
-    updateSinceUntilBuild = false
+    updateSinceUntilBuild = true
 
     downloadSources = !CI && downloadIdeaSources.toBoolean()
 

gradle.properties

@@ -8,9 +8,9 @@
 # MIT License
 #
 # suppress inspection "UnusedProperty" for whole file
-ideaVersion = 2017.2
+ideaVersion = 2017.2.5
 javaVersion = 1.8
-kotlinVersion = 1.1.3-2
+kotlinVersion = 1.1.4-3
 
 group = com.demonwav.minecraft-dev
 version = 2017.2-0.7.5