New classifier: The 3-Clause BSD Licence

[thijsmie]

I would like to request the addition of a new trove classifier for "The 3-Clause BSD License". The full classifier would be:
License :: OSI Approved :: The 3-Clause BSD License (BSD-3-Clause)

Our project eclipse-cyclonedds/cyclonedds-python is dual licensed for EPL-2 and EDL-1.0 which is equivalent with BSD-3-CLAUSE which right now cannot be reflected on Pypi.

The BSD-3-CLAUSE license in question can be found here. The EDL-1.0 can be found here