code is out of date with current Zinc

[SethTisue]

as @jvican observes,

this is quite old (2 years ago) and some changes have happened in Zinc regarding type dependencies that may be need to be duplicated here (i haven't dug into the code yet). In that case I can do that.

[SethTisue]

note that the source file in question is https://github.com/lightbend/scala-sculpt/blob/master/src/main/scala/com/lightbend/tools/sculpt/plugin/ExtractDependencies.scala . this code was extracted from zinc by @adriaanm in 2015