The old glob assumed one digit before the ".". Now pick anything
that doesn't start with "v" and is on the main branch. These are
always merge commits. Code merged in is on the second parent.
This port is meant to grow to encompass all existing boards. For
now, it is a port while we transition over.
It is named `zephyr-cp` to differentiate it from the MicroPython
`zephyr` port. They are separate implementations.