Publish Fastr on Maven

[wetneb]

Some Truffle language implementations, such as GraalJS, publish their releases on Maven Central. This makes it easy to use these language implementations in any Java project (not necessarily running on GraalVM), especially if they use Maven or Gradle as build systems. An example of such an application is available at graalvm/graal-js-jdk11-maven-demo.

I would like to have Maven packages like graaljs does, but for Fastr, so that Fastr can be used in any Maven project (either on a stock JVM or GraalVM).

This would benefit from Sulong being released on Maven, so that Fastr can rely on it as a dependency: https://github.com/oracle/graal/issues/2048.

[steve-s]

The discussion from GraalPython also applies to FastR: https://github.com/graalvm/graalpython/issues/96