in-toto-1.2.0-bp160.1.10

- update to version 1.2.0
  * python 3.10 compability
  * python module dependency upgrades

- Do not use python_subpackages: as this is an application, not a
  python module, we want the package to be called in-toto, not
  python3-in-toto. Use static python3-FOO (Build)?Requires.

- use pythons python3

- spec-cleaner, update copyright year, use pypi tarball, remove
  service madness, add missing changes file

- Initial package