CI add CircleCI redirector

[glemaitre]

Add CircleCI redirector

[codecov]

Codecov Report

Merging #877 (0fe173b) into master (67d2122) will decrease coverage by 4.11%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #877      +/-   ##
==========================================
- Coverage   97.23%   93.12%   -4.12%     
==========================================
  Files          96       96              
  Lines        6253     6253              
  Branches      712      712              
==========================================
- Hits         6080     5823     -257     
- Misses        102      370     +268     
+ Partials       71       60      -11     

Impacted Files	Coverage Δ
imblearn/keras/tests/test_generator.py	7.93% <0.00%> (-92.07%)	⬇️
imblearn/tensorflow/_generator.py	34.37% <0.00%> (-65.63%)	⬇️
imblearn/tests/test_docstring_parameters.py	30.93% <0.00%> (-55.40%)	⬇️
imblearn/tensorflow/tests/test_generator.py	10.75% <0.00%> (-54.84%)	⬇️
imblearn/keras/_generator.py	47.36% <0.00%> (-47.37%)	⬇️
imblearn/datasets/tests/test_zenodo.py	70.27% <0.00%> (-24.33%)	⬇️
imblearn/base.py	94.59% <0.00%> (-4.06%)	⬇️
imblearn/pipeline.py	93.47% <0.00%> (-1.09%)	⬇️
imblearn/ensemble/_forest.py	91.66% <0.00%> (-0.65%)	⬇️

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