Update Kotlin

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/src/main/java/com/nextcloud/talk/application/NextcloudTalkApplication.java

@@ -117,7 +117,7 @@ public class NextcloudTalkApplication extends MultiDexApplication implements Pro
         FirebaseAnalytics.getInstance(this).setAnalyticsCollectionEnabled(false);
 
         sharedApplication = this;
-        
+
         initializeWebRtc();
         DisplayUtils.useCompatVectorIfNeeded();
 

build.gradle

@@ -3,7 +3,7 @@
 buildscript {
 
     ext {
-        kotlinVersion = '1.1.51'
+        kotlinVersion = '1.2.21'
     }
 
     repositories {