Add regex as a new dependency (#1253)
Summary:
Add regex as a new dependency as it is needed by torchtext: https://github.com/pytorch/text/pull/1946
Test workflow:
https://github.com/pytorch/benchmark/actions/runs/3284313972
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1253
Reviewed By: davidberard98
Differential Revision: D40497588
Pulled By: xuzhao9
fbshipit-source-id: 6b936ceda26af61f2fd57dc366cd2703efe3ef57
