Format for timeline parameters that are dates

[tomelliot]

Hi there,

I just ran into a small issue. The documentation has examples such as
const tweetsOfJack = await client.v2.userMentionTimeline('12', { end_time: '2020-01-01' });

Running this with TwitterApiV2Settings.debug = true; results in an error from the Twitter API:

The end_time query parameter value [2020-01-01] is not a valid RFC3339 date-time.

Here are some examples of the format needed by the API (from here)

• 1985-04-12T23:20:50.52Z
• 1937-01-01T12:00:27.87+00:20