* ✨ Add support for PEP-593 `Annotated` for specifying options and arguments
Implements #184
* Revert things I did to get a 3.6 virtualenv 😅
A lot of the dev dependency packages weren't installable on 3.6, so I
had to remove them from the pyproject.toml.
This commit adds them back
* Fix mypy/lint errors
* Skip coverage on test lines that shouldn't execute
* Missed a spot
* ♻️ Tweak examples and tests with Annotated, add extra examples and tests
* 🔥 Remove Pydantic-specific logic from _typing.py
* 📝 Update docs to use new Annotated examples
* 📝 Add docs introducing Annotated and previous versions
* 🔧 Add commented out MkDocs config for highlighting docs examples
* ✅ Fix tests for Click 7
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Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>
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