Update Kotlin 1.3-M2 (android#186)

Author: XinyueZ

build.gradle

@@ -29,7 +29,7 @@ buildscript {
         gradleVersion = '3.2.0-rc03'
         gsonVersion = '2.8.2'
         junitVersion = '4.12'
-        kotlinVersion = '1.2.70'
+        kotlinVersion = '1.3-M2'
         ktlintVersion = '0.28.0'
         ktxVersion = '0.3'
         lifecycleVersion = '1.1.1'
@@ -44,6 +44,7 @@ buildscript {
     repositories {
         google()
         jcenter()
+        maven { url 'http://dl.bintray.com/kotlin/kotlin-eap' }
     }
 
     dependencies {
@@ -61,6 +62,7 @@ allprojects {
     repositories {
         google()
         jcenter()
+        maven { url 'http://dl.bintray.com/kotlin/kotlin-eap' }
     }
 }