* Added WS endpoint for changing homeassistant password.

* Remove change password helper. Don't require current password.

* Restore current password verification.

* Added tests.

* Use correct send method

* Disallow use insecure_example auth provider in configuration.yml

* Add unit test for auth provider config validate

This fixes a bunch of bugs, including issues with concurrency in devices
that present multiple accessories, devices that insist on the TLV entries
being in the order that Apple use, and handling devices that send headers
and data in separate chunks. This should improve compatibility with
a whole bunch of HomeKit devices.

* Add onboarding support

* Lint

* Address comments

* Mark user step as done if owner user already created

* Extract SSL context creation to helper (#15483)

* Extract SSL context creation to helper

* Lint

* Bumped version to 0.73.2

* Make sure we cannot deactivate the owner

* Use different error code when trying to fetch token for inactive user

* Add user via cmd line creates owner

* Ensure access tokens are not verified for inactive users

* Stale print

* Lint

* Update to next version with enum states

* Change to generic dimmer class

* Update of requirement files

* Update to hmip lib to v0.9.7

* Missing update of requirements files

* Cleanup of icon properties

* add tuya light platform

* fix as review required

* Implement is_on

* Remove var

* Fix ZWave RGBW lights not producing color without explicit white_value (#13930)

* simplify conditional in previous commit (#13930)

* ZwaveColorLight - only zero _white if white_value not specified in call (#13930)

* Add dimmable light device

* Add imports

* Fix float and int conversion

## Description:

More typing improvements.

Switch to using `mypy.ini` for flexibility

Add `warn_return_any` check except in `homeassistant.util.yaml` that does typing hacks. Fix some type annotations as resulting from this check and ignore others were fixing is hard.

## Checklist:
  - [x] The code change is tested and works locally.
  - [x] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**

* User management

* Lint

* Fix dict

* Reuse data instance

* OrderedDict all the way

* Upgrade mypy to 0.600

* Upgrade mypy to 0.610

* Typing improvements

* remove unneeded or

* remove merge artifact

* Update loader.py

## Description:

Make typing checks more strict: add `--strict-optional` flag that forbids implicit None return type. This flag will become default in the next version of mypy (0.600)

Add `homeassistant/util/` to checked dirs.

## Checklist:
  - [x] The code change is tested and works locally.
  - [x] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**

* Add Python 3.8-dev tox tests.

* Allow failures on 3.8-dev

* Allow failures on 3.8-dev take2

* Only run on pushes to dev