FIX: Set random state in classification test

[thibaultcordier]

Description

Set the random state of a classification test (this test sometimes leads to coverage failure).

Fixes #307

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I have read the contributing guidelines
• I have updated the HISTORY.rst and AUTHORS.rst files
• Linting passes successfully : make lint
• Typing passes successfully : make type-check
• Unit tests pass successfully : make tests
• Coverage is 100% : make coverage
• Documentation builds successfully : make doc

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (b99bb8c) 100.00% compared to head (c383f52) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #306   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           32        32           
  Lines         3523      3524    +1     
  Branches       364       364           
=========================================
+ Hits          3523      3524    +1     

Impacted Files	Coverage Δ
mapie/tests/test_classification.py	100.00% <100.00%> (ø)
mapie/tests/test_multi_label_classification.py	100.00% <100.00%> (ø)

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[vincentblot28]

Add this change to the History.rst

[LacombeLouis]

Good. I think it would be best to set the variable random_state = 42 and then use that variable every time. But this fixes the quick issue.