[Android] Upgrade Kotlin and kotlinx

[Geoffrey Métais]

vlc-android | branch: 3.2.x | Geoffrey Métais <geoffrey.metais at gmail.com> | Mon Sep  9 14:58:56 2019 +0200| [f61d06ca29a60783e126662b2f44a40150cf30ab] | committer: Geoffrey Métais

Upgrade Kotlin and kotlinx

(cherry picked from commit e1317c8d7f3d3671c7080a6952b6543c02fdcc48)

> https://code.videolan.org/videolan/vlc-android/commit/f61d06ca29a60783e126662b2f44a40150cf30ab
---

 build.gradle | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/build.gradle b/build.gradle
index 714609b6a..9a6e2c4a1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,8 +1,8 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     ext.android_plugin_version = '3.5.0'
-    ext.kotlin_version = '1.3.41'
-    ext.kotlinx_version = '1.2.2'
+    ext.kotlin_version = '1.3.50'
+    ext.kotlinx_version = '1.3.1'
     repositories {
         flatDir dirs: "gradle/plugins"
         google()