Py-consul

- **feature:** drop tornado and twisted support
- **env:** support python 3.10 and 3.11
- **env:** drop support of EOL python versions 3.5, 3.6, and 3.7
- **code-style:** syntax modernization
- **code-style:** formatter and linter use
- **ci:** multiple python version test and linter enforcement

- **feature:** aio: allow setting timeout by request

- **feature:** base: ensure return format of json callback is more consistent

- **bugfix:** connect: fix wrong endpoints callbacks

- **feature:** Add support for context-managers
- **feature:** Add support for /agent/service/:service_id API
- **bugfix:** rename internal connect method

- **feature:** Support deregister field in Check.script
- **feature:** Introduce Consul Connect-related API wrappers
- **feature:** Add token support missing in multiple methods
- **bugfix:** aio: fix timeout type
- **feature:** allow multiple tags in service health query