Patch the PHP-CSS-Parser library to correctly validate the turn unit (#5392)

Author: pierlon

composer.json

@@ -52,6 +52,7 @@
     },
     "patches": {
       "sabberworm/php-css-parser": {
+        "Add additional validation for size unit <https://github.com/sabberworm/PHP-CSS-Parser/pull/193>": "patches/php-css-parser-pull-193.patch",
         "Validate name-start code points for identifier <https://github.com/sabberworm/PHP-CSS-Parser/pull/185>": "patches/php-css-parser-pull-185.patch",
         "Fix parsing CSS selectors which contain commas <https://github.com/westonruter/PHP-CSS-Parser/pull/1>": "patches/php-css-parser-commit-10a2501.patch"
       }

composer.lock

@@ -1561,7 +1561,7 @@ private function get_parsed_stylesheet( $stylesheet, $options = [] ) {
 		$parsed         = null;
 		$cache_key      = null;
 		$cached         = true;
-		$cache_group    = 'amp-parsed-stylesheet-v32'; // This should be bumped whenever the PHP-CSS-Parser is updated or parsed format is updated.
+		$cache_group    = 'amp-parsed-stylesheet-v33'; // This should be bumped whenever the PHP-CSS-Parser is updated or parsed format is updated.
 		$use_transients = $this->should_use_transient_caching();
 
 		$cache_impacting_options = array_merge(