Fix PHP7.4 build

Author: staabm

build/baseline-7.4.neon

@@ -77,3 +77,8 @@ parameters:
 			message: "#^Class PHPStan\\\\Reflection\\\\BetterReflection\\\\SourceLocator\\\\CachingVisitor has an uninitialized property \\$constantNodes\\. Give it default value or assign it in the constructor\\.$#"
 			count: 1
 			path: ../src/Reflection/BetterReflection/SourceLocator/CachingVisitor.php
+
+		-
+			message: '#^Parameter \#1 \$array \(non-empty-list<PHPStan\\Type\\Type>\) of array_values is already a list, call has no effect\.$#'
+			count: 1
+			path: ../src/Type/TypeCombinator.php