--jvm flag

[armanbilge]

Is your feature request related to a problem? Please describe.
Sometimes I have a script with //> using platform "js" but I would like quickly run it on JVM to compare behavior (I work a lot on cross-compiling libraries to have identical cross-platform semantics).

Describe the solution you'd like
There are already flags --js and --native, so it seems fitting to have --jvm.

Describe alternatives you've considered
I could not specify the platform in a directive, and always pass by command-line. But directives are very convenient :)

[wleczny]

As of v0.1.15 it will be possible to set platform via --platform option:

scala-cli Foo.scala --platform jvm

In order to use it now, use nightly version of Scala CLI:

scala-cli --cli-version nightly Foo.scala --platform jvm