KSC Not Working With Java 10 JRE
I believe this is actually an SBT error (see https://github.com/sbt/sbt-native-packager/issues/1145), but KSC should probably be changed to use the latest version of SBT that fixes this.

The error is this message when I try to run KSC:

"The java installation you have is not up to date
requires at least version 1.6+, you have
version 10.0.2"

Changing to the Java 8 JRE immediately fixes this.

Supposedly sbt-native-packager:1.3.3 and up has a fix for this issue (similar issue fixed in this repo by updating the version number https://github.com/mgifos/quick-plan/issues/27), so I suspect the fix is just changing line 3 in plugins.sbt from:

addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.2")

to

addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.3")

and confirming all the tests pass.
