Remove whitespace from Kotlin version

Author: jossiwolf

mockito-kotlin/build.gradle

@@ -3,7 +3,7 @@ apply from: '../publishing.gradle'
 apply plugin: 'org.jetbrains.dokka'
 
 buildscript {
-    ext.kotlin_version = "1.3.0-rc-146 "
+    ext.kotlin_version = "1.3.0-rc-146"
 
     repositories {
         mavenCentral()