python3-tomli-1.2.3-150500.1.5

- Rename package to avoid conflicts with the new Python Stack Proposal (jsc#PED-68)

- Update(back) to 1.2.3 (from 2.0.1) since 2.0.1 needs python 3.7

- Merge base and -test package, there is no extra dependency any
  more, tests just need the python interpreter

- Yet another dependency cycle to break: tomli - flit_core - tomli
  https://flit.readthedocs.io/en/latest/bootstrap.html

- BuildIgnore ca-certificates: python-pip brings it in for regular
  operation, but as we do not ever do https:// connections during a
  build we do not depend on certificates. Allows us to break up a
  build cycle.

- Split build and tests in _multibuild in order to avoid depcycle

- initial specfile for version 1.2.1
- required by setuptools_scm