Equals updates (#987)

* Docs update

Changed the param names and param descriptions to be consistent.

* Added === comparison

Changed Presence.equals and Game.equals to first compare using ===

* Collection.equals fix

Now returns false when collection is undefined, instead of crashing
💯

src/util/Collection.js

@@ -338,6 +338,7 @@ class Collection extends Map {
    * @returns {boolean} Whether the collections have identical contents
    */
   equals(collection) {
+    if (!collection) return false;
     if (this === collection) return true;
     if (this.size !== collection.size) return false;
     return !this.find((value, key) => {