Add convenience function RichEmbed.addBlankField (#1139)

src/structures/RichEmbed.js

@@ -150,6 +150,15 @@ class RichEmbed {
     return this;
   }
 
+  /**
+   * Convenience function for `<RichEmbed>.addField('\u200B', '\u200B', inline)`.
+   * @param {boolean} [inline=false] Set the field to display inline
+   * @returns {RichEmbed} This embed
+   */
+  addBlankField(inline = false) {
+    return this.addField('\u200B', '\u200B', inline);
+  }
+
   /**
    * Set the thumbnail of this embed
    * @param {string} url The URL of the thumbnail