Library hangs if you stub the system time

[kevinburkeshyp]

Occasionally in tests we stub the system time using sinon.useFakeTimers. This causes the fast-csv library to hang before writing any rows.

It looks like the problem is here: https://github.com/C2FO/fast-csv/blob/master/lib/extended.js#L16-L23. This library is not the only library with this problem: sinonjs/sinon#960

I'm not completely sure why this is happening, or necessary, though it's certainly unexpected that stubbing the system time would cause CSV writing to fail. Debugging errors like this is particularly frustrating due to the lack of stack traces or useful information about running threads of execution while Javascript is executing.

[dustinsmith1024]

We use https://github.com/vesln/timekeeper for testing internally. You might try using it instead of Sinon's built in time traveling.