Invenio-Query-Parser v0.2.0

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
version: post-release version bump

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
setup: licence statement fix

* Fixes licence classifier in `setup.py` that mistakenly read MIT
  instead of GPLv2+.

* Fixes licence statement in `tox.ini`.

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>