expose createDM (#1151)

* expose createDM

* Update User.js

* in v12 we are removing these, kay?

* Update GuildMember.js

* Update User.js

src/structures/GuildMember.js

@@ -395,12 +395,20 @@ class GuildMember {
     return this.edit({ nick });
   }
 
+  /**
+   * Creates a DM channel between the client and the member
+   * @returns {Promise<DMChannel>}
+   */
+  createDM() {
+    return this.user.createDM();
+  }
+
   /**
    * Deletes any DMs with this guild member
    * @returns {Promise<DMChannel>}
    */
   deleteDM() {
-    return this.client.rest.methods.deleteChannel(this);
+    return this.user.deleteDM();
   }
 
   /**

src/structures/User.js

@@ -179,6 +179,14 @@ class User {
     return this.client.channels.filter(c => c.type === 'dm').find(c => c.recipient.id === this.id);
   }
 
+  /**
+   * Creates a DM channel between the client and the user
+   * @returns {Promise<DMChannel>}
+   */
+  createDM() {
+    return this.client.rest.methods.createDM(this);
+  }
+
   /**
    * Deletes a DM channel (if one exists) between the client and the user. Resolves with the channel if successful.
    * @returns {Promise<DMChannel>}