#84: Downgrade exoplayer extension version

Closes #84 (closed)

buildSrc/src/main/java/Versions.kt

@@ -5,7 +5,7 @@ object Versions {
   const val gradleDependencyPlugin = "0.38.0"
 
   const val exoPlayer = "2.11.8"
-  const val exoPlayerExtensions = "2.14.0"
+  const val exoPlayerExtensions = "2.11.4"
   const val fuel = "2.3.1"
   const val gson = "2.8.7"
   const val powerPreference = "2.0.0"