[Feature] Add PyTorch 1.9 tests in CI

[gaotongxiao]

No description provided.

[codecov]

Codecov Report

Merging #401 (1b7a011) into main (a2af2b4) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #401      +/-   ##
==========================================
+ Coverage   83.21%   83.23%   +0.02%     
==========================================
  Files         137      137              
  Lines        9155     9155              
  Branches     1299     1299              
==========================================
+ Hits         7618     7620       +2     
+ Misses       1244     1243       -1     
+ Partials      293      292       -1     

Flag	Coverage Δ
unittests	83.23% <ø> (+0.02%)	⬆️

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Impacted Files	Coverage Δ
mmocr/models/textrecog/convertors/seg.py	91.66% <0.00%> (+2.77%)	⬆️

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