Scala 2.12 Support

[joshgarnett]

Would it be possible to get a 2.12 version pushed to maven?

[non]

Yes! I'm working on this this weekend.

[pijusn]

I assume you haven't been working on this issue for the past 8 months, right? 😄 Is this project dead?

[xuwei-k]

https://repo1.maven.org/maven2/org/spire-math/debox_2.12/0.8.0/