Update to laravel 7

vendor/symfony/translation/Loader/YamlFileLoader.php

@@ -29,10 +29,10 @@ class YamlFileLoader extends FileLoader
     /**
      * {@inheritdoc}
      */
-    protected function loadResource($resource)
+    protected function loadResource(string $resource)
     {
         if (null === $this->yamlParser) {
-            if (!class_exists('Symfony\Component\Yaml\Parser')) {
+            if (!class_exists(\Symfony\Component\Yaml\Parser::class)) {
                 throw new LogicException('Loading translations from the YAML format requires the Symfony Yaml component.');
             }
 
@@ -42,9 +42,13 @@ class YamlFileLoader extends FileLoader
         try {
             $messages = $this->yamlParser->parseFile($resource, Yaml::PARSE_CONSTANT);
         } catch (ParseException $e) {
-            throw new InvalidResourceException(sprintf('Error parsing YAML, invalid file "%s"', $resource), 0, $e);
+            throw new InvalidResourceException(sprintf('The file "%s" does not contain valid YAML: ', $resource).$e->getMessage(), 0, $e);
         }
 
-        return $messages;
+        if (null !== $messages && !\is_array($messages)) {
+            throw new InvalidResourceException(sprintf('Unable to load file "%s".', $resource));
+        }
+
+        return $messages ?: [];
     }
 }