Aiocouch

- Added support for /db/_purge endpoint, which allows to remove all references to a document
- Added `Document.json` property, which is a dict representing the document data
- Added `HTTPResponse` as return from certain `Document` endpoints that may give 202 Accepted HTTP status codes
- Improved documentation
- [BREAKING] `Document.clone()` no longer returns the cloned document

- Fixed BasicAuth for UTF-8 encoded credentials

- Fixed unexpected exception when calling CouchDB.create(exists_ok=True) in case of race conditions

- Added support for /db/_changes endpoint, which allows to listen for change events
- Added support for /db/_index endpoint, which allows to create indexes on databases
- Improved documentation

- Fixes missing module dependency
- Added Python 3.10 to list of supported python versions
- CI: Running tests in isolated environment from linting

- Adds context managers for automatic saving of Documents
- Adds documentation for attachments and bulk operations
- Adds Mypy typing support