not possible to build for release 5.0

[janneman001]

it looks like cpanm does not work for release 5.0 when i use branch release-5.0-stable
Also looks like the Dockerfile is just building for master and skipping 4.4 and 5.0 at least no condition is in place there.

The error i get when targetting the docker build for release 5.0 is:

Failed to upconvert metadata to 1.1. Errors:
Missing mandatory field, 'version' (version) [Validation: 1.0]
at /usr/local/bin/cpanm line 132.