Deprecate the support for "python setup.py test"

[MeowZheng]

refer to open-mmlab/mmcv#1637

[codecov]

Codecov Report

Merging #73 (039f12d) into master (88b73e9) will decrease coverage by 0.12%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #73      +/-   ##
==========================================
- Coverage   68.07%   67.95%   -0.13%     
==========================================
  Files          85       85              
  Lines        4855     4855              
  Branches      696      696              
==========================================
- Hits         3305     3299       -6     
- Misses       1450     1452       +2     
- Partials      100      104       +4     

Flag	Coverage Δ
unittests	67.95% <ø> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmflow/datasets/pipelines/transforms.py	79.83% <0.00%> (-1.00%)	⬇️
mmflow/datasets/dataset_wrappers.py	43.75% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 88b73e9...039f12d. Read the comment docs.