Update Scala versions and library dependencies

[pauljamescleary]

Let's get these things current, including java version.

[ptravers]

Sure are we purely adding support for current libraries or are we also dropping support for older libraries?

[pauljamescleary]

I think we cross compile. I think for the newest version (master) we remove support for EOL'd stuff. We may have to support Java 7 still, we can cross compile for scala 2.11 and scala 2.12.

Even Java 7 has been EOL'd, but Java 8 is going to hang out for YEARS as the next LTS is Java 11 not out yet.

[pauljamescleary]

Hrm, in hindsight Java 7 was EOL 3 years ago! I would say, let's continue to support Java 7 if possible as the world doesn't move fast. If it becomes too cumbersome, then scratch it.

If we can still support scala 2.11, we should be fine with Java 7 as that is the minimum JVM required

[ptravers]

Okay so are we dropping Scala 2.10 support then?

[pauljamescleary]

I think we should drop Scala 2.10 support. Should update everything to be Scala 2.11 cross compile to Scala 2.12.

[ptravers]

So I've had a go for a bit today I'm currently seeing a bunch of breakages by just switching the cross compile to 2.11 and 2.12 for Scala. That forces an update to Scalatest. Which then broke mockito. I got it to compile but there's a bunch of runtime exceptions in the Spring and AspectJ packages.