Process hangs after logging (issue #41 has come back)

[valtonia]

Hi,

• winston 3.3.3
• winston-graylog 2.1.2

I'm having the same issue as https://github.com/namshi/winston-graylog2/issues/41 where after writing to Graylog the process doesn't exit.

I can see the fix applied on PR https://github.com/namshi/winston-graylog2/issues/24 (or a modified version of it) is still there in the code.

Is there something else I need to do to make it call close() after writing?