* Default error handler now only logs traceback on 500 errors and all responses are HTML formatted.
* Tests passing.
* Ability to flag any exception object with self.quiet = True following @ashleysommer suggestion.
* Refactor HTML formatting into errorpages.py. String escapes for debug tracebacks.
* Remove extra includes
* Auto-set quiet flag also when decorator is used.
* Cleanup, make error pages (probably) HTML5-compliant and similar for debug and non-debug modes.
* Fix lookup of non-existant status codes
* No logging of 503 errors after all.
* lint
Update all tests to be compatible with requests-async
Cleanup testing client changes with black and isort
Remove Python 3.5 and other meta doc cleanup
rename pyproject and fix pep517 error
Add black config to tox.ini
Cleanup tests and remove aiohttp
tox.ini change for easier development commands
Remove aiohttp from changelog and requirements
Cleanup imports and Makefile
Original sanic exception handler only could handle exact matching
exceptions. New `lookup` method will provide ability to looking up
their ancestors without additional cost of performance.
