Replace NimbleOptions `rename_to` with a custom function

[hoyon]

Fixes #68

This PR replaces the nimble_options :replace_to with a custom function which achieves the same thing as this option is now deprecated in nimble_options 0.4.

I've also upgraded nimble_options to 0.4.

We had an issue with running the tests locally as it seems the capture_logs in some tests aren't capturing long enough to capture the expected error logging. Adding Process.sleep fixes those tests but of course that isn't an ideal solution so I've left the tests as is for now.

[arkgil]

Thanks @hoyon, looks great! ⚡

[ximura]

Hi @arkgil Are you planning releasing this fix?

[arkgil]

Just pushed 0.6.2 to hex: https://hexdocs.pm/telemetry_metrics_statsd/0.6.2/TelemetryMetricsStatsd.html 🚀