Bump version to 1.4.0-SNAPSHOT

@@ -42,7 +42,7 @@ LiveKit for Android is available as a Maven package.
 dependencies {
   implementation "io.livekit:livekit-android:1.3.0"
   // Snapshots of the latest development version are available at:
-  // implementation "io.livekit:livekit-android:1.3.1-SNAPSHOT"
+  // implementation "io.livekit:livekit-android:1.4.0-SNAPSHOT"
 }
 ```
 

@@ -23,7 +23,7 @@ kotlin.code.style=official
 ###############################################################
 
 GROUP=io.livekit
-VERSION_NAME=1.3.0
+VERSION_NAME=1.4.0-SNAPSHOT
 
 POM_DESCRIPTION=LiveKit Android SDK, WebRTC Rooms