Add 0.3.2 release notes [skip ci]
### Added
+## [0.3.2](https://github.com/MarquezProject/marquez/releases/tag/0.3.2) - 2019-05-14
+
+### Changed
+
+* Set `job_versions.updated_at` to `CURRENT_TIMESTAMP`
+
## [0.3.1](https://github.com/MarquezProject/marquez/releases/tag/0.3.1) - 2019-05-14
### Added
