Fastpack hangs when run in CI

[VitGottwald]

When we run fastpack as part of our build, it hangs.

The build is driven by maven, which uses frontend-maven-plugin to install nodejs+yarn and then runs them. Package.json specifies script fast that runs fastpack.

https://github.com/baremetalfreak/fpack-maven-hang contains a minimal case to reproduce the problem. Note that I had to install make into the image because fpack postinstall depends on it. I think it should be removed if possible. Many CI images do not have it.

[VitGottwald]

Note I have fixed node and yarn versions in the engines section of package.json. They are most likely insignificant and you can just remove them and still be able to reproduce the issue.

[VitGottwald]

resolved by release 0.5.3