IMSM version 1.3 (called ATTRIBS) brought attributes used to define array
properties which require support in driver. The goal of this change was
to avoid changing version when adding new features.
For some reasons migration has never been completed and currently (after
10 years of implementing) IMSM can use older versions.
It is right time to finally switch it. There is no point in using old
versions, use 1.3.00 as minimal one.