Remove dependency on Timex

[davydog187]

Hello 👋🏼 Very cool library, thanks for sharing this great work!

I am evaluating Cocktail and noticed the dependency on Timex with a transitive dependency on combine. As far as I can tell, most of the use of Timex is now supported by the Elixir standard library, with a few notable exceptions:

• Timex.beginning_of_day/1 - Can be done via setting the time component to 00:00:00
• Timex.weekday/1 - Convert datetime to date, then https://hexdocs.pm/elixir/Date.html#day_of_week/2
• Timex.iso_week/1 - Unclear on replacement

Github Search for Timex usage in Cocktail

Assuming we can find suitable solutions to the above functions, would you be interested in a PR that removes the dependency on Timex?

Thanks!

[davydog187]

On further investigation, this library makes use of Timex types to express durations that do not exist in the standard library. I don't think it would be worth trying to cut this over.