Bring fingerprint2.js scriptlet up to date

Related issue:
- uBlockOrigin/uAssets#4961

assets/resources/resources.txt

@@ -1971,11 +1971,17 @@ twitch-videoad.js application/javascript
 # https://github.com/uBlockOrigin/uAssets/issues/2912
 fingerprint2.js application/javascript
 (function() {
+	let browserId = '';
+	for ( let i = 0; i < 8; i++ ) {
+		browserId += (Math.random() * 0x10000 + 0x1000 | 0).toString(16).slice(-4);
+	}
 	let fp2 = function(){};
+	fp2.get = function(opts, cb) {
+		if ( !cb  ) { cb = opts; }
+		setTimeout(( ) => { cb(browserId, []); }, 1);
+	};
 	fp2.prototype = {
-		get: function(cb) {
-			setTimeout(function() { cb('', []); }, 1);
-		}
+		get: fp2.get
 	};
 	window.Fingerprint2 = fp2;
 })();