quantized operations will be part of the 1.2 release. They are aimed to land in PyTorch master in May.
You can read the proposal here: https://github.com/pytorch/pytorch/issues/18318 11
There are a few people working on it, you can follow some of the PRs. For example https://github.com/pytorch/pytorch/pulls?utf8=✓&q=is%3Apr+author%3Ajerryzh168+ 6 is one developer who is filing and merging PRs to help enable this.