Fix UsageOfDeprecatedCastRule - it reported all casts, not just (string)

Author: ondrejmirtes

src/Rules/Deprecations/UsageOfDeprecatedCastRule.php

@@ -10,7 +10,7 @@
 use function sprintf;
 
 /**
- * @implements Rule<Cast>
+ * @implements Rule<Cast\String_>
  */
 class UsageOfDeprecatedCastRule implements Rule
 {
@@ -24,7 +24,7 @@ public function __construct(DeprecatedScopeHelper $deprecatedScopeHelper)
 
 	public function getNodeType(): string
 	{
-		return Cast::class;
+		return Cast\String_::class;
 	}
 
 	public function processNode(Node $node, Scope $scope): array

tests/Rules/Deprecations/data/usage-of-deprecated-cast.php

@@ -24,3 +24,7 @@ function deprecatedScope(Foo $foo): string
 {
 	return (string) $foo;
 }
+
+function foo2(Foo $foo): string {
+	return (int) $foo;
+}