Add versioning properties

[andrea-perego]

Problem statement

Following DCAT 3, DCAT-AP 3 introduces a set of versioning properties, replacing the corresponding ones in earlier versions of DCAT-AP (see the DCAT-AP 3 specification, §A.1).

In particular:

• dcat:hasVersion replaces dct:hasVersion (deprecated).
• dcat:isVersionOf replaces dct:isVersionOf (deprecated).
• dcat:version replaces owl:versionInfo (deprecated).

Proposal

To be aligned with DCAT-AP 3 and DCAT 3, GeoDCAT-AP 3 should deprecate the use of dct:hasVersion, dct:isVersionOf, and owl:versionInfo, and replace them with dcat:hasVersion, dcat:isVersionOf, and dcat:version, respectively.

[jakubklimek]

dcat:hasVersion and dcat:version were added. dcat:isVersionOf was removed due to #90