Changelog:
===========
-Correct type for path argument to send_file.
-Fix a typo in an error message for the flask run --key option.
-Session data is untagged without relying on the built-in json.loads object_hook.
-Address more type findings when using mypy strict mode.
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
