Codeforcesapipy

* Catching 502 response from server
* Updated all dependencies.
* Updated lxml to 4.6.3 to resolve security issues.

* Linted with black

* Bump isort from 5.7.0 to 5.8.0 (12)

* Updated cache in workflows

* Reusing code for checking user

* Added dependabot workflow

* Added GitHub actions to dependabot

* Added Github QL checking

* Added error info in get_response

* More info added on JSONDecodeError exception

* Updated version

* Renamed variables to not conflict with Python reserved words.
* Removed wildcard import.
* Added Tests passing in README.
* Code refactor.