update v1.0.3.3

vendor/symfony/yaml/README.md

@@ -0,0 +1,21 @@
+Yaml Component
+==============
+
+YAML implements most of the YAML 1.2 specification.
+
+```php
+use Symfony\Component\Yaml\Yaml;
+
+$array = Yaml::parse(file_get_contents(filename));
+
+print Yaml::dump($array);
+```
+
+Resources
+---------
+
+You can run the unit tests with the following command:
+
+    $ cd path/to/Symfony/Component/Yaml/
+    $ composer install
+    $ phpunit