adding code_with_match (#1024)

Author: QuentinRa

doc/search.md

@@ -13,13 +13,19 @@ $repos = $client->api('search')->repositories('github language:php');
 Returns a list of repositories found by such criteria.
 
 ### Search code
- 
+
 ```php
 $files = $client->api('search')->code('@todo language:php');
 ```
 
 Returns a list of files found by such criteria (containing "@todo" and language==php).
 
+```php
+$files = $client->api('search')->code_with_match('@todo language:php');
+```
+
+Same as code, with additional data to highlight the matching fragments (see [Text match metadata](https://docs.github.com/en/rest/reference/search#text-match-metadata)).
+
 ### Search issues
 
 ```php

lib/Github/Api/Search.php

@@ -61,6 +61,24 @@ public function code($q, $sort = 'updated', $order = 'desc')
         return $this->get('/search/code', ['q' => $q, 'sort' => $sort, 'order' => $order]);
     }
 
+    /**
+     * Search code by filter (q), but will return additional data to highlight
+     * the matched results.
+     *
+     * @link https://docs.github.com/en/rest/reference/search#text-match-metadata
+     *
+     * @param string $q     the filter
+     * @param string $sort  the sort field
+     * @param string $order asc/desc
+     *
+     * @return array list of code found
+     */
+    public function code_with_match($q, $sort = 'updated', $order = 'desc')
+    {
+        $this->acceptHeaderValue = 'application/vnd.github.v3.text-match+json';
+        return $this->code($q, $sort, $order);
+    }
+
     /**
      * Search users by filter (q).
      *