fix phpstan self-analysis errors: ignore property.notFound, add null guard in getTypeAliasName

Author: shmax

src/PhpDoc/PhpDocNodeResolver.php

@@ -522,7 +522,7 @@ public function resolveTypeAliasTags(PhpDocNode $phpDocNode, NameScope $nameScop
 			foreach ($phpDocNode->getTypeAliasTagValues($tagName) as $typeAliasTagValue) {
 				$alias = $typeAliasTagValue->alias;
 				$typeNode = $typeAliasTagValue->type;
-				$resolved[$alias] = new TypeAliasTag($alias, $typeNode, $nameScope, $typeAliasTagValue->templateTypes ?? []);
+				$resolved[$alias] = new TypeAliasTag($alias, $typeNode, $nameScope, $typeAliasTagValue->templateTypes ?? []); // @phpstan-ignore property.notFound
 			}
 		}
 

src/Type/Generic/TemplateTypeScope.php

@@ -60,7 +60,7 @@ public function isTypeAlias(): bool
 	/** @api */
 	public function getTypeAliasName(): ?string
 	{
-		if (!$this->isTypeAlias()) {
+		if (!$this->isTypeAlias() || $this->functionName === null) {
 			return null;
 		}