try to compile kotlin properly 3.0

build.gradle

@@ -1,7 +1,6 @@
 // forge's stuff
 
 buildscript {
-    ext.kotlin_version = '1.3.72'
     repositories {
         jcenter()
         maven {
@@ -17,18 +16,28 @@ buildscript {
         classpath 'net.minecraftforge.gradle:ForgeGradle:2.3-SNAPSHOT'
         classpath 'org.spongepowered:mixingradle:0.6-SNAPSHOT'
         classpath 'com.github.jengelman.gradle.plugins:shadow:4.0.3'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-    }
+        classpath group: 'org.jetbrains.kotlin', name: 'kotlin-gradle-plugin', version: "${kotlin_version}"    }
 }
 
-apply plugin: 'net.minecraftforge.gradle.forge'
 apply plugin: 'kotlin'
+apply plugin: 'net.minecraftforge.gradle.forge'
 apply plugin: 'org.spongepowered.mixin'
 apply plugin: 'com.github.johnrengelman.shadow'
 
 version project.modVersion
 group project.modGroup // http://maven.apache.org/guides/mini/guide-naming-conventions.html
 
+compileKotlin {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+compileTestKotlin {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
 sourceCompatibility = targetCompatibility = '1.8'
 compileJava {
     sourceCompatibility = targetCompatibility = '1.8'
@@ -154,13 +163,3 @@ jar {
 }
 
 build.dependsOn(shadowJar)
-compileKotlin {
-    kotlinOptions {
-        jvmTarget = "1.8"
-    }
-}
-compileTestKotlin {
-    kotlinOptions {
-        jvmTarget = "1.8"
-    }
-}

gradle.properties

@@ -3,4 +3,5 @@ modGroup=me.zeroeightsix
 modVersion=1.1.4-beta
 modBaseName=kamiblue
 forgeVersion=1.12.2-14.23.5.2847
-mcpVersion=stable_39
+mcpVersion=stable_39
+kotlin_version=1.3.40