Roll more version numbers to 1.4.0 (#27751)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/27751
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Differential Revision: D17886488
Pulled By: ezyang
fbshipit-source-id: 1c8d98b6f7ee3127ebec9a0b03132c38c97523c3
