A few issue fixes

Response headers were still being sent even after the Response->respond() method was called.
Problem: It was causing an error if using echo in the user code.
Solution: Updated Response->respond() method to exit after the response is sent causing the execution to end immidieately for a given request.

Some servers are not supporting HTTP Methods except for GET and POST
Problem: Need a way to send PUT, PATCH and DELETE as they are commonly used Http Methods
Solution: Supported a header X-HTTP-METHOD-OVERRIDE whose value can be the HTTP method you need to send. This can be achieved using http POST request too.# On branch master

Author: abhayjatindoshi

src/request/Request.php

@@ -14,6 +14,9 @@ private function __construct(){
         $this->params = $_GET;
         $this->headers = array_change_key_case(getallheaders(),CASE_UPPER);
         $this->cookies = $_COOKIE;
+        if(isset($this->headers['X-HTTP-METHOD-OVERRIDE'])){
+            $this->method = $this->headers['X-HTTP-METHOD-OVERRIDE'];
+        }
     }
 
     private static $request;

src/response/Response.php

@@ -18,5 +18,6 @@ public function __construct(?string $data, $status=200){
     public function respond() : void{
         http_response_code($this->status);
         echo $this->data;
+        exit;
     }
 }