Fixes lint issue

Author: antonis

packages/core/src/js/feedback/FeedbackWidget.tsx

@@ -33,7 +33,6 @@ export class FeedbackWidget extends React.Component<FeedbackWidgetProps, Feedbac
     ...defaultConfiguration
   }
 
-  private _didSubmitForm: boolean = false;
   private static _savedState: Omit<FeedbackWidgetState, 'isVisible'> = {
     name: '',
     email: '',
@@ -42,6 +41,8 @@ export class FeedbackWidget extends React.Component<FeedbackWidgetProps, Feedbac
     attachment: undefined,
   };
 
+  private _didSubmitForm: boolean = false;
+
   public constructor(props: FeedbackWidgetProps) {
     super(props);