Update sbt-native-packager to 1.3.15
Update sbt-native-packager to 1.3.15

ChristopherDavenport/http4s,ChristopherDavenport/http4s,aeons/http4s,aeons/http4s,ChristopherDavenport/http4s,rossabaker/http4s,rossabaker/http4s,http4s/http4s,aeons/http4s