Add scala 2.13 support

[holinov]

I hardly need to use it on scala 2.13 What assistance do you need?

[holinov]

I'v started a fork https://github.com/holinov/zio-scala-cass I dont know if you would be able to adopt my changes to your needs

[thurstonsand]

awesome. the main problem is you made a LOT of whitespace changes. could you get rid of those? also, what problems did you have with wartremover and sbt sites that you commented all that out?

as it is, I have no idea what changes you've actually made, due to all the whitespace changes

[thurstonsand]

see the PR here: https://github.com/thurstonsand/scala-cass/pull/53

[thurstonsand]

I probably recommend you re-fork (or just create a new branch and sync it with my master), and make just the changes you need to upgrade to 2.13. then i can see the changes and figure out how to merge