Merge pull request #9 from johnnybenson/patch-1

Update SchemaValidatorService.php to fix deprecation notice

Author: jwadhams

app/SchemaValidatorService.php

@@ -111,7 +111,7 @@ private function normalizeData($data)
     public function validateOrThrow(
         $data,
         $schema,
-        string $exceptionMessage = null,
+        ?string $exceptionMessage = null,
         bool $appendValidationDescriptions = false,
         int $failureHttpStatusCode = Response::HTTP_BAD_REQUEST,
     ): bool {
@@ -144,7 +144,7 @@ public function validateOrThrow(
     public function validateEncodedStringOrThrow(
         string $data,
         $schema,
-        string $exceptionMessage = null,
+        ?string $exceptionMessage = null,
         bool $appendValidationDescriptions = false,
         int $failureHttpStatusCode = Response::HTTP_BAD_REQUEST,
     ): bool