Nile-upgrades

What's Changed
**Breaking change:** `deploy_proxy`: Changed default value of `unique` to `True`

**Full Changelog**: https://github.com/OpenZeppelin/openzeppelin-nile-upgrades/compare/v0.0.2...v0.0.3

What's Changed
* Add default values for salt and unique parameters by ericglau in https://github.com/OpenZeppelin/openzeppelin-nile-upgrades/pull/35
* **Breaking change:** Changed the order of parameters for `deploy_proxy`

**Full Changelog**: https://github.com/OpenZeppelin/openzeppelin-nile-upgrades/compare/v0.0.1...v0.0.2

Initial release.