Add missing comma in ASExperimentalFeatures #trivial (TextureGroup#1137)

Author: nguyenhuy

Source/ASExperimentalFeatures.m

@@ -20,7 +20,7 @@
                                       @"exp_network_image_queue",
                                       @"exp_dealloc_queue_v2",
                                       @"exp_collection_teardown",
-                                      @"exp_framesetter_cache"
+                                      @"exp_framesetter_cache",
                                       @"exp_skip_clear_data"]));
 
   if (flags == ASExperimentalFeatureAll) {