Update hints about type hints (#901)

Co-authored-by: Ruslan Sayfutdinov <ruslan@sayfutdinov.com>

docs/development_checklist.md

@@ -9,7 +9,7 @@ Before you commit any changes, check your work against these requirements:
 - New dependencies are added to `requirements_all.txt` (if applicable), using `python3 -m script.gen_requirements_all`
 - New codeowners are added to `CODEOWNERS` (if applicable), using `python3 -m script.hassfest`
 - The `.coveragerc` file is updated to exclude your platform if there are no tests available or your new code uses a third-party library for communication with the device, service, or sensor. `config_flow.py` can't be excluded as it must be fully tested (100% coverage).
-- The `.no-strict-typing` file is updated to exclude your code if it doesn't provide a fully type hinted source.
+- The `.strict-typing` file is updated to include your code if it does provide a fully type hinted source.
 - The code is formatted using Black, as per these [guidelines](https://developers.home-assistant.io/blog/2019/07/31/black.html). This can be done running the command `black --fast homeassistant tests`.
 - Documentation is developed for [home-assistant.io](https://home-assistant.io/)
   - Visit the [website documentation](/documenting.md) for more information about contributing to [home-assistant.io](https://github.com/home-assistant/home-assistant.io).

docs/development_guidelines.md

@@ -73,6 +73,6 @@ _LOGGER.info("Can't connect to the webservice %s at %s", string1, string2)
 We encourage the use of fully typing your code. This helps with finding/preventing issues and bugs in our codebase,
 but also helps fellow contributors making adjustments to your code in the future as well.
 
-By default, Home Assistant will assume everything has type hints and our automated CI process will also check for this.
-Python modules can be excluded from this behavior by adding an entry to the `.no-strict-typing` file in the
-root of the Home Assistant Core project.
+By default, Home Assistant will statically check for type hints and our automated CI process.
+Python modules can be include for strict checking, if they are fully typed, by adding an entry
+to the `.strict-typing` file in the root of the Home Assistant Core project.

docs/development_typing.md

@@ -24,8 +24,9 @@ We've added a script to start a run of our test suite or a test module and tell
 **Note:**
 Applying a monkeytyped stub to a module that has existing typing annotations might error and not work. This tool is most useful for totally untyped modules.
 
-### Excluding modules from type checking
+### Including modules for strict type checking
 
 While we encourage the use of type hints, we currently do not require them for our integrations.
-By default, our CI assumes files do have type hints. In case the added module doesn't have this, it can be excluded by adding the module to the `.no-strict-typing` file
+By default, our CI checks statically for type hints. In case a module has been fully typed, it can be
+marked for enabling strict checks, by adding the module to the `.strict-typing` file
 that is located at the root of the Home Assistant Core project.