Fix doSystemAndReleaseMatch to handle arm64

[fishfacemcgee]

Fixes #52

If a more conservative approach to the changes is preferred, I can do something like this instead:

private boolean doSystemAndReleaseMatch(String arch, String os) {
    return arch.equals(this.getArch()) && os.equals(this.getOs())
    || SystemUtils.IS_OS_MAC && os.equals("darwin");
}

My thinking is that the Mac condition was an attempt to handle Arm-based Macs, but, since Arm is being detected properly, it should no longer need a special case.

[alfespa17]

Thank you @fishfacemcgee , I think it should work