Update build.sbt to use enablePlugins syntax (#13)
Update build.sbt to use enablePlugins syntax (#13)

The package archetype syntax is deprecated and broken.

See also https://github.com/sbt/sbt-native-packager/pull/1088
muuki88/sbt-native-packager-examples,muuki88/sbt-native-packager-examples,muuki88/sbt-native-packager-examples