Fixed build

Author: ondrejmirtes

src/Rules/Methods/MissingMethodParameterTypehintRule.php

@@ -42,6 +42,9 @@ public function processNode(Node $node, Scope $scope): array
 				continue;
 			}
 
+			/** @var string $message */
+			$message = $message;
+
 			$messages[] = $message;
 		}
 

src/Rules/Methods/WrongCaseOfInheritedMethodRule.php

@@ -51,6 +51,10 @@ public function processNode(
 			if ($interfaceMessage === null) {
 				continue;
 			}
+
+			/** @var string $interfaceMessage */
+			$interfaceMessage = $interfaceMessage;
+
 			$messages[] = $interfaceMessage;
 		}