Send STATE records to stdout

[bradleyprice]

This will pass all STATE records to stdout.

The command could now be:

tap | target >> state.json

And the resulting state file would look something like this:

{ "users": 1 }
{ "users": 2 }

With this approach, if the end user only cares about the latest
STATE record, they can manually handle updating their state file:

tail -1 state.json > state.json.tmp && mv state.json.tmp state.json