Bump transformer version (#2488)
Summary:
Bump transformer version to enable linger-kernels
Pull Request resolved: https://github.com/pytorch/benchmark/pull/2488
Reviewed By: FindHao
Differential Revision: D63860019
Pulled By: xuzhao9
fbshipit-source-id: f607c5553169c61270e4f5271d8375d7f227bd82
