feat(Message): add url getter (#2594)

* feat(Message): add jumpToURL getter

* fix url

* url syntax update

* name to url

src/structures/Message.js

@@ -237,6 +237,15 @@ class Message extends Base {
     return this.channel.guild || null;
   }
 
+  /**
+   * The url to jump to this message
+   * @type {string}
+   * @readonly
+   */
+  get url() {
+    return `https://discordapp.com/channels/${this.guild ? this.guild.id : '@me'}/${this.channel.id}/${this.id}`;
+  }
+
   /**
    * The message contents with all mentions replaced by the equivalent text.
    * If mentions cannot be resolved to a name, the relevant mention in the message content will not be converted.