* implement oldest newest and near methods in the cdx interface class, now cli uses the cdx methods instead of availablity api methods.
* handle the closest parameter derivative methods more efficiently and also handle exceptions gracefully.
* update test code
* enable codecov
* fix save_urls_on_file
* increase the limit of CDX to 25000 from 5000. 5X increase.
* added test for the CLI module
* make flake 8 happy
* make mypy happy
* added RedirectSaveError - for failed saves if the URL is a permanent redirect.
* check if url is redirect before throwing exceptions, res.url is the redirect url if redirected at all
* update tests and cli errors
* Added some docstrings in utils.py
* renamed some func/meth to better names and added doc strings + lint
* added more docstrings
* more docstrings
* improve docstrings
* docstrings
* added more docstrings, lint
* fix import error
* Update cli.py
* improved tests
* chnages for proper testing
* Type check using isinstance
* Replace elifs with if when used after return
* twitter.com --> www.ibm.com
* fix typo
* test archive urll parser and dunders
* Update test_wrapper.py
