Rename EndPointInterface.php to EndpointInterface.php

PSR-4 autoloading won't load if the capitalization is wrong and .git configs ignore changes of filename casing by default 💩

Author: valzargaming

src/VerifierServer/Endpoints/EndPointInterface.php renamed to src/VerifierServer/Endpoints/EndpointInterface.php

@@ -32,4 +32,4 @@ public function handle(
         string &$body,
         bool $bypass_token = false
     ): void;
-}
+}