pak is now more tolerant with extraneous whitespace in PACKAGES*
metadata files (#785).

pak now builds again on FreeBSD (#790).

Installing dependencies of a package file with deps::<filename>
works again (#784).

pak now always uses the correct working directory in the subprocess;
this was a common source of errors.

New (nightly) binary builds for aarch64 Windows.

We do not build binary builds for the release candidate of pak any
more, only for stable and devel pak. rc is an alias to stable now.