Pedro Gutiérrez

**Describe the bug** [This call](https://github.com/akoutmos/prom_ex/blob/b0bd0fe3ec93edbfcb26d73c0d3b1738e60b0f07/lib/prom_ex/plugins/plug_cowboy.ex#L228) in Plug.Cowboy plugin suggests we are doing an extra call to the router in order to resolve the parameterised path if our router is not...