github action support

[Ran-Xing]

      - 
        name: Docker Setup Buildx
        uses: docker/setup-buildx-action@v1.6.0
        with:
          json: test.json
          jdk: 16
          platform: mac
          executable: test
          mainclass: core.ui.MainActivity
          classpath: test.jar
          vmargs: |
            "Dfile.encoding=utf-8",
            "ParallelGCThreads=4 ", 
            "AggressiveHeap", 
            "+UseParallelGC", 
            "Xms512M",
            "Xmx1024M"
          output: test.app
          icon: test.icns

Hope to support

[karlsabo]

I don't understand what this is.

[yairm210]

He wants you to make a Github action that supports adding parameters and transfers them to a packr cli call.

@Ran-Xing If you want there to be a github action that uses Packr, you don't need the packr guys to error it, you could make it yourself.

This should not be a "packr" issue.

[Ran-Xing]

@yairm210 For various reasons, I don't think I can do it at present.