Update Kotlin version

Author: tschuchortdev

build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.3.41'
+    ext.kotlin_version = '1.3.50'
 
     repositories {
         mavenCentral()
@@ -13,7 +13,7 @@ buildscript {
 
 plugins {
     id 'java'
-    id 'org.jetbrains.kotlin.jvm' version '1.3.41'
+    id 'org.jetbrains.kotlin.jvm' version '1.3.50'
 }
 
 apply plugin: 'kotlin'
@@ -56,8 +56,8 @@ dependencies {
 
     // the Kotlin compiler should be near the end of the list because its .jar file includes
     // an obsolete version of Guava
-    implementation "org.jetbrains.kotlin:kotlin-compiler-embeddable:1.3.41"
-    implementation "org.jetbrains.kotlin:kotlin-annotation-processing-embeddable:1.3.41"
+    implementation "org.jetbrains.kotlin:kotlin-compiler-embeddable:1.3.50"
+    implementation "org.jetbrains.kotlin:kotlin-annotation-processing-embeddable:1.3.50"
 }
 
 compileKotlin {