Tf-shell

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.7...v0.1.8

Highlights:
- Support plaintext DP-SGD when noise protocol is disabled but noise multiplier > 0.

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.32...v0.1.34

Highlights:
- Bug fix for hyperparameter tuning.

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.32...v0.1.33

Highlights:
- Models use callback to set noise multiplier to better support for automated hyper-tuning of encryption parameters.

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.31...v0.1.32

Highlights:
- Support keras tuner to search hyperparameter space (including encryption parameters!) for dpsgd and post-scale models.

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.30...v0.1.31

**Full Changelog**: https://github.com/google/tf-shell/compare/v0.1.29...v0.1.30