removed PHP < 7 support

Author: dg

src/Http/Request.php

@@ -291,7 +291,7 @@ public function getRemoteHost()
 	 */
 	public function getRawBody()
 	{
-		return $this->rawBodyCallback ? call_user_func($this->rawBodyCallback) : NULL;
+		return $this->rawBodyCallback ? ($this->rawBodyCallback)() : NULL;
 	}
 
 

src/Http/Url.php

@@ -410,7 +410,7 @@ public function getBaseUrl()
 	 */
 	public function getRelativeUrl()
 	{
-		return (string) substr($this->getAbsoluteUrl(), strlen($this->getBaseUrl()));
+		return substr($this->getAbsoluteUrl(), strlen($this->getBaseUrl()));
 	}
 
 

tests/Http/Response.setCookie.phpt

@@ -23,15 +23,13 @@ $response = new Http\Response;
 
 $response->setCookie('test', 'value', 0);
 $headers = array_values(array_diff(headers_list(), $old, ['Set-Cookie:']));
-$headers = str_replace('HttpOnly', 'httponly', $headers);
 Assert::same([
-	'Set-Cookie: test=value; path=/; httponly',
+	'Set-Cookie: test=value; path=/; HttpOnly',
 ], $headers);
 
 
 $response->setCookie('test', 'newvalue', 0);
 $headers = array_values(array_diff(headers_list(), $old, ['Set-Cookie:']));
-$headers = str_replace('HttpOnly', 'httponly', $headers);
 Assert::same([
-	'Set-Cookie: test=newvalue; path=/; httponly',
+	'Set-Cookie: test=newvalue; path=/; HttpOnly',
 ], $headers);