Standardised laravel validation to be array based

Converted from string-only-based validation.
Array based validation works nicer once you have validation classess or
advanced validation options.

app/Http/Controllers/Auth/ForgotPasswordController.php

@@ -43,7 +43,9 @@ class ForgotPasswordController extends Controller
      */
     public function sendResetLinkEmail(Request $request)
     {
-        $this->validate($request, ['email' => 'required|email']);
+        $this->validate($request, [
+            'email' => ['required', 'email']
+        ]);
 
         // We will send the password reset link to this user. Once we have attempted
         // to send the link, we will examine the response then see the message we