[Android] Upgrade kotlinx version to v0.23.3

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Thu Jun 28 15:14:48 2018 +0200| [dc38bb6454e2e0b665a02f14ea62dc7ac94b4126] | committer: Geoffrey Métais

Upgrade kotlinx version to v0.23.3

> https://code.videolan.org/videolan/vlc-android/commit/dc38bb6454e2e0b665a02f14ea62dc7ac94b4126
---

 build.gradle | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.gradle b/build.gradle
index eb7c550f8..f7e2881a5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,7 +2,7 @@
 buildscript {
     ext.android_plugin_version = '3.1.3'
     ext.kotlin_version = '1.2.50'
-    ext.kotlinx_version = '0.23.1'
+    ext.kotlinx_version = '0.23.3'
     repositories {
         flatDir dirs: "gradle/plugins"
         google()