Remove duplicated bits

[rgaudin]

• moved flake8 config to setup.cfg to save a file
• removed --profile param on isort in tasks as setup.cfg specifies it
• removed --max-line-length param on flake8 in tasks as setup.cfg specifies it
• removed Pipfile as dev dependencies are specified in dev-requirements.txt
• updated .gitignore to new file naming and added placeholder for dev files
• Restored a search test as upstream is fixed

[codecov[bot]]

Codecov Report

Merging #122 (a2ce3a9) into master (17f806d) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #122   +/-   ##
=======================================
  Coverage   97.83%   97.83%           
=======================================
  Files           1        1           
  Lines         416      416           
=======================================
  Hits          407      407           
  Misses          9        9           

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[rgaudin]

Ah! that run_tests.sh is the whole reason I started this and I forgot it 😅