chore(core): prevent 500 on warning (#782)

Author: brendt

src/Tempest/Http/src/Exceptions/HttpProductionErrorHandler.php

@@ -23,6 +23,7 @@ public function handleError(int $errNo, string $errstr, string $errFile, int $er
         if (
             $errNo === E_USER_WARNING
             || $errNo === E_DEPRECATED
+            || $errNo === E_WARNING
         ) {
             return;
         }