Update all instances of 1.4.0 -> 1.5.0 (#31785)
Summary:
Done with:
```
❯ sed -i 's/1\.4\.0/1.5.0/g' $(find -type f -not -path "./third_party/*")
```
This was previously done in separate commits, but it would be beneficial to bump all included projects within this repository at the same time.
Old bumps for reference:
* [iOS]Update Cocoapods to 1.4.0: https://github.com/pytorch/pytorch/pull/30326
* [android] Change nightly builds version to 1.4.0-SNAPSHOT: https://github.com/pytorch/pytorch/pull/27381
* Roll master to 1.4.0: https://github.com/pytorch/pytorch/pull/27374
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>
Pull Request resolved: https://github.com/pytorch/pytorch/pull/31785
Differential Revision: D19277925
Pulled By: seemethere
fbshipit-source-id: f72ad082f0566004858c9374879f4b1bee169f9c
