packaging >= 22 dropped support for LegacyVersion, which was the usual
result of an invalid version number being parsed. Now it is PEP-440
strict and throws an exception on fails. This fixes the script to work
with both older and newer releases.
Signed-off-by: Fabio Utzig <utzig@apache.org>
Add new CI vm that parses the imgtool version from __init__.py and
compares with the current published release. If the version in the repo
is newer it will be published automatically.
Signed-off-by: Fabio Utzig <utzig@apache.org>