Upgrade ts to the latest version and fix type errors

packages/app/components/auth/PanelTransition.tsx

@@ -406,7 +406,7 @@ class PanelTransition extends React.PureComponent<Props, State> {
     });
   };
 
-  onGoBack: MouseEventHandler = (event): void => {
+  onGoBack: MouseEventHandler<HTMLButtonElement> = (event): void => {
     event.preventDefault();
     authFlow.goBack();
   };

packages/app/components/auth/actions.ts

@@ -680,7 +680,7 @@ function validationErrorsHandler(
   repeatUrl?: string,
 ): (
   resp: Resp<{
-    errors?: Record<string, string>;
+    errors?: Record<string, string | ValidationError>;
     data?: Record<string, any>;
   }>,
 ) => Promise<never> {