prepare release 21.12.0 (#255)

Co-authored-by: morph027 <stefan.heitmueller@gmx.com>

Fix bug issues with duplicate params and null data (#246)

* Fix bug issues with duplicate params and null data

* bump version

Multiple fixes and improvements (#244)

Resolve bug where static files not displaying (#241)

* version bump

* Version set

CBV method support and OAS3 autodoc (#234)

* Add autodoc and CBV support

* Add CBV support to oas2

* Version and changelod

Add missing packages to build

sanic 21.3 support (#218)

* s21

* style

* Cleanup testing

* Reformatting

* Bump version

* squash

* Run black

Co-authored-by: Adam Hopkins <admhpkns@gmail.com>

Merge pull request #176 from huge-success/release/0.6.2

Release 0.6.2

Merge pull request #154 from chenjr0719/bump_version

fix: bump "__version__" to 0.6.1

Merge pull request #122 from chenjr0719/docs

Docs