New upstream version 2.0.8

CONTRIBUTING.md

README.md

docs/source/annotations.rst

docs/source/settings.rst

psqlextra/compiler.py

psqlextra/query.py

tests/test_append_caller_to_sql.py

tests/test_on_conflict.py

tests/test_query.py

tests/test_upsert.py

tests/test_view_models.py

tox.ini