[CX-1182] protowhat update

[hermansje]

Ticket

Link to ticket: https://datacamp.atlassian.net/browse/CX-1182

What has been done

• Update sqlwhat to build on this protowhat refactor.

How to test

• Run the tests on top of the protowhat branch

[codecov]

Codecov Report

Merging #146 into master will decrease coverage by 0.52%.
The diff coverage is 87.5%.

@@            Coverage Diff             @@
##           master     #146      +/-   ##
==========================================
- Coverage   80.78%   80.26%   -0.53%     
==========================================
  Files           7        7              
  Lines         229      228       -1     
==========================================
- Hits          185      183       -2     
- Misses         44       45       +1

Impacted Files	Coverage Δ
sqlwhat/sct_context.py	100% <100%> (ø)
sqlwhat/checks/__init__.py	100% <100%> (ø)	⬆️
sqlwhat/checks/has_funcs.py	100% <100%> (ø)	⬆️
sqlwhat/checks/check_funcs.py	61.32% <62.5%> (-0.72%)	⬇️
sqlwhat/test_exercise.py	94.11% <92.85%> (-5.89%)	⬇️

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