Support custom HTTP method on `statusUrl`
**Is your feature request related to a problem? Please describe.**
Unable to get accurate status for services that don't use `GET` to return the status. The service I'm interacting with (a Toshiba TV), requires `POST`.

**Describe the solution you'd like**
Use the `method` value, if present, for `statusUrl` like `onUrl` and `offUrl`.

**Additional context**
I saw in the code that there's a comment around this expectation and it not being available due to backwards compatibility. Is this still a blocker?

My workaround would be building my own simple service that would effectively be a proxy to do a `POST` request for `statusUrl`. 😬

Thank you for making this Homebridge plugin in the first place!