MAPG-199 fix issues found by PHPStan

src/Interfaces/Http/IRequest.php

@@ -10,9 +10,9 @@ interface IRequest
 
     public function setMethod(int $method): void;
 
-    public function setQuery($query);
+    public function setQuery($query): void;
 
-    public function setHeaders(array $headers);
+    public function setHeaders(array $headers): void;
 
     public function send(): IResponse;
 }

src/Interfaces/Http/IResponse.php

@@ -2,7 +2,7 @@
 
 interface IResponse
 {
-    public function getBody();
+    public function getBody(): string;
 
-    public function getHeaders();
+    public function getHeaders(): array;
 }

src/Interfaces/Request/IRequest.php

@@ -4,7 +4,7 @@ use MapGuesser\Interfaces\Authentication\IUser;
 
 interface IRequest
 {
-    public function setParsedRouteParams(array &$routeParams);
+    public function setParsedRouteParams(array &$routeParams): void;
 
     public function getBase(): string;