[Android] Upgrade kotlinx to v0.30.2

[Geoffrey Métais]

vlc-android | branch: master | Geoffrey Métais <geoffrey.metais at gmail.com> | Tue Oct  9 16:16:28 2018 +0200| [a9adba1df9c8f0276665dd6b219142f3b7f8890d] | committer: Geoffrey Métais

Upgrade kotlinx to v0.30.2

> https://code.videolan.org/videolan/vlc-android/commit/a9adba1df9c8f0276665dd6b219142f3b7f8890d
---

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

diff --git a/build.gradle b/build.gradle
index c4ae395ad..677151266 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,7 +2,7 @@
 buildscript {
     ext.android_plugin_version = '3.2.0'
     ext.kotlin_version = '1.2.71'
-    ext.kotlinx_version = '0.27.0'
+    ext.kotlinx_version = '0.30.2'
     repositories {
         flatDir dirs: "gradle/plugins"
         google()