data.table backend for tk_augment_lags #102

[AlbertoAlmuinha]

Hi @mdancho84 ,

I just updated the tk_augment_lag and tk_augment_lead functions so they work with data.table and tidytable behind. I think that with the changes made, both functions should be much faster because they are practically already written with functions that call C code. As a good practice, I think I would try to change the rest of the functions little by little to try to introduce tidytable as much as possible because it already has a large number of supported functions (all map family, dplyr verbs, tidyr family...). I have been very impressed with this package really.

Regards,

[mdancho84]

Excellent!!