HTML5: Fix minification error with Emscripten 1.39.9

It used an old vendored version of acorn.js which seems to choke on this
trailing comma. This is not a problem for more recent Emscripten versions.

We disable the `comma-dangle` check in ESLint to prevent this issue.

platform/javascript/js/libs/library_godot_audio.js

@@ -229,7 +229,7 @@ const GodotAudioWorklet = {
 					'godot-processor',
 					{
 						'outputChannelCount': [channels],
-					},
+					}
 				);
 				return Promise.resolve();
 			});