Update setup.py

add `long_description_content_type`

bump version

Merge develop (#9)

* Session refactor

* Session fix

* Add ctx.env and Env-fixture

* Add ctx.env into app examples

* Fix template folder logic

* Fix examples apps

* Use the return value from take_on-hook if it is not None

Also fix bugs:
  - copy `_reverse_map` when cloning context
  - rebuild `_reverse_map` after mixins merging
  - hold edge case for fixtures with `is_hook=True`

* fix cli and reloader

* fix pyjsaw processing

* fix forget

* ensure uuid in session when saving

* Bump version

bump version