Updating userObject for identify & track call

[usmanity]

Moving to 1.0.0 so that all new changes are versioned properly and this will drop support for anything older than 1.0.0.

• time_stamp is now an available parameter for track calls
• userObject has been rewritten, includes cleaning out undefined properties before sending data
• Adding underscore
• Updating request from 2.36.0 to 2.55.0
• adding a bunch of missing semi-colons coz of OCD
• removing userAttributes from track call

[MrTravisB]

Looks good. Just make the one suggested change and merge. :+1: