Update jarjar-abrams to 1.14.0

[BardurArantsson]

My use case is that I'd like to use ShadingRules.Zap which was added in a later version of jarjar than the only currently in use in sbt-shading.

Btw, I'm seeing some stuff like

Expected class name: argonaut.Json
Class name: foo.shaded.argonaut.Json
Exception in thread "main" java.lang.RuntimeException: Expected class name argonaut.Json, got foo.shaded.argonaut.Json
        at scala.sys.package$.error(package.scala:27)

from some of the scripted tests, but they run without failure. Not sure if that's a problem or if it's to be expected.

[tgodzik]

Seems to work ok, let's merge it