Htmlgen

Incompatible Changes

* Drop support for Python 2.7 and 3.4.

API Additions

* Add `Video` element.
* Add `Button.disabled`.
* Add `autocomplete` attribute to `Input`, `TextArea`, `Select`, and `Form`.
* Add `enum_attribute`.

API Additions

* Add `GenValue` and `GenValueGenerator` to `htmlgen`.

API Additions

* `from htmlgen import ElementBase` now works.

Bug Fixes

* Add missing `ElementBase` to type stubs.

API Additions

* Make `ElementBase` public.
* Add `GenValue` and `GenValueGenerator` type aliases.
* Fix annotation of `Heading`.

Improvements

* PEP 561 support.
* Improve type hints.

No changes.