Pyramid-oereb

- Oereblex: support new Oereblex API version 1.2.1
- Various library updates

Version synchronized with pyramid_oereb release v1.9.0.
Functional change: use new configuration option ``print_canton_logo``

- Update of external libraries such as numpy, SQLAlchemy, lxml, and more.
- oereblex support: avoid extract failure upon missing enactment_date in oereblex (1093)
- Improve support of Python 3.7 in template Makefile and sample data loading (1104, 1106)

Update to latest version of MapFish Print. Notes to consider when updating from version 1.7.6:
- update your config.yaml to the latest version, this is necessary due to the "pdfA" attribute which was renamed in MapFish Print from "allowTransparency" and now has a reversed meaning,
- update your docker-compose to the latest version, this is necessary due to the new environment variable PRINT_YAML_MAX_ALIASES to avoid a SnakeYAML error with the newest library of SnakeYAML.

Version increase to stay in sync with pyramid_oereb version; no functional changes.

Update recommended version of MapFish Print, to solve problem 55.