StatSender interface signature has changed

[Han Liang Alvin See]

Hi there,

Tried configuring the StatSender in statsdmetrics.CommandFactory{} and realised the statsdmetrics.StatSender interface no longer matches the StatSender interface in go-statsd-client.

https://github.com/cactus/go-statsd-client/blob/6348b56a993b50ba0d50dd9c3515c79dab38d639/statsd/client.go#L18-L28

Seems like they've introduced a new variadic parameter for tags at the end

[Jack Lindamood]

Thanks for the update. I don't think I can change this API to match because it would be a breaking change for users of the library. I recommend maybe a comment at the interface with a recommendation that people implement a custom metrics collector.

We have one for prometheus here. If you want to make one for statsd with the new API, you can reference it and I'll update the docs to point to it as an alternative.

[Jack Lindamood]

Will close as wontfix for v3 since we cannot break people's code, but will address in v4 here: #115