`_status` not reset after FluentLoggerError.MissingTag

On FluentLoggerError.MissingTag errors the reconnect handler (https://github.com/fluent/fluent-logger-node/blob/master/lib/sender.js#L453) does not set `_status` back to `established`, and does not re-emit the `connect` event.

Background: I've implemented a bounded event queue that queues if the fluent-logger is not connected, and attempts to flush when the logger reconnects. In cases of event data errors callers cannot be accurately notified of when the logger reconnects either through looking at `_status` or depending on the `connect` event.

Start at lib/sender.js around line 453, where the reconnect handler processes FluentLoggerError.MissingTag. Trace the reconnect behavior and verify that completion leaves the logger status and connect notification consistent with the issue description.

Written by the indexing model from the issue text.