Minimal JVM and scala-native echo command

Latest version

[![scalapy-echo Scala version support](https://index.scala-lang.org/coursier/echo/scalapy-echo/latest.svg)](https://index.scala-lang.org/coursier/echo/scalapy-echo)

JVM badge

[![scalapy-echo Scala version support](https://index.scala-lang.org/coursier/echo/scalapy-echo/latest-by-scala-version.svg?platform=jvm)](https://index.scala-lang.org/coursier/echo/scalapy-echo)

Scala Native 0.4 badge

[![scalapy-echo Scala version support](https://index.scala-lang.org/coursier/echo/scalapy-echo/latest-by-scala-version.svg?platform=native0.4)](https://index.scala-lang.org/coursier/echo/scalapy-echo)