Merge pull request #266 from raicabogdan/5.9.x

Update Request api documentation

Author: niden

docs/api/phalcon_http.md

@@ -700,12 +700,7 @@ private $queryFilters;
 /**
  * @var array|null
  */
-private $patchCache;
-
-/**
- * @var array|null
- */
-private $putCache;
+private $postCache;
 
 /**
  * @var string
@@ -1152,6 +1147,12 @@ Checks whether HTTP method is HEAD.
 if _SERVER["REQUEST_METHOD"]==="HEAD"
 
 
+```php
+public function isJson(): bool;
+```
+Checks whether request content type contains json data
+
+
 ```php
 public function isMethod( mixed $methods, bool $strict = bool ): bool;
 ```