use `--release` flag on newer JDKs (#280)
use `--release` flag on newer JDKs (#280)

When running on a new enough version of Scala or the JDK
use the `--release` flag to target JDK8. Ensures we should
be able to run on JDK8 or newer.
Netflix-Skunkworks/iep-apps,Netflix-Skunkworks/iep-apps