type-hints and restructure scraper module

[otosky]

todo:

• add coverage badge
• add note in readme about breaking change
• make initialization of client in CLI a lazy_proxy
• use pydantic models for responses
• add publish to pypi on tag push

[codecov-commenter]

Codecov Report

Merging #9 (5a97fe2) into master (4af40ea) will increase coverage by 35.89%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##           master        #9       +/-   ##
============================================
+ Coverage   64.10%   100.00%   +35.89%     
============================================
  Files           4        12        +8     
  Lines         312       332       +20     
============================================
+ Hits          200       332      +132     
+ Misses        112         0      -112     

Impacted Files	Coverage Δ
medium_stats/__init__.py	100.00% <100.00%> (ø)
medium_stats/cli/core.py	100.00% <100.00%> (ø)
medium_stats/cli/main.py	100.00% <100.00%> (ø)
medium_stats/cli/publication.py	100.00% <100.00%> (ø)
medium_stats/cli/user.py	100.00% <100.00%> (ø)
medium_stats/config.py	100.00% <100.00%> (ø)
medium_stats/scraper/__init__.py	100.00% <100.00%> (ø)
medium_stats/scraper/base.py	100.00% <100.00%> (ø)
medium_stats/scraper/publication.py	100.00% <100.00%> (ø)
medium_stats/scraper/queries.py	100.00% <100.00%> (ø)
... and 3 more

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