Development

- Removed unused exception from PHP-docs.
- Fixed types not same as declared.
- Fixed issues with reg-ex and php-unit tests.
- Removed unnecessary type casting.
- Declared functions as static (better scoping + performance).
- Moved `\is_callable($callback) === false` as the execution costs less than previous in `Router.php`.
- Changed `ob_get_contents` to `ob_get_clean`.
- Added type hints to methods.

src/Pecee/SimpleRouter/Route/IGroupRoute.php

@@ -59,7 +59,7 @@ interface IGroupRoute extends IRoute
      * @param string $prefix
      * @return static
      */
-    public function setPrefix($prefix): self;
+    public function setPrefix(string $prefix): self;
 
     /**
      * Get prefix.