Fix to move fatal to “standard” props

Closes GH-11.

Reviewed-by: Christian Murphy <christian.murphy.42@gmail.com>
Reviewed-by: Merlijn Vos <merlijn@soverin.net>
Reviewed-by: Titus Wormer <tituswormer@gmail.com>

index.js

@@ -73,6 +73,12 @@ export class VFileMessage extends Error {
      * @type {string}
      */
     this.reason = this.message
+    /**
+     * If true, marks associated file as no longer processable.
+     * @type {boolean?}
+     */
+    // eslint-disable-next-line no-unused-expressions
+    this.fatal
     /**
      * Starting line of error.
      * @type {number?}
@@ -110,11 +116,6 @@ export class VFileMessage extends Error {
      * @type {string?}
      */
     this.file
-    /**
-     * If true, marks associated file as no longer processable.
-     * @type {boolean?}
-     */
-    this.fatal
     /**
      * You may add a url property with a link to documentation for the message.
      * @type {string?}