Option to use java-time instead of joda

[conan]

Currently Amazonica converts java.util.Dates to org.joda.time.DateTimes. Now that we have the time API from Java 8, and good support for it in clojure, it would be great to have an option to work with the native classes, or at least to leave java.util.Dates as they are without conversion.

[henryw374]

I think just leave dates alone and/or make the conversion extensible.

interested in a PR? if so, is a breaking change (ie no joda dep) ok?

[henryw374]

PR here #431

In the meantime, it's quite straightforward to add one extend-protocol of IMarshall and one alter-var-root of to-date in your own project.

[ieugen]

I also support moving to standard libraries and dropping extra code.
Long term is easier for maintenance, including security related issues (post log4j bulnerabilities).
Less is more.

[henryw374]

yeah I actually stopped using Amazonica and use the official java v2 client directly - not difficult from Clojure & it's well documented

[Limess]

This'd be very nice to stop us from having to pull in clj-time in all our libraries. We'd prefer to not immediately have to switch to the java SDK or https://github.com/cognitect-labs/aws-api.