Add 0.7.0 release notes [skip ci]
### Added
+## [0.7.0](https://github.com/MarquezProject/marquez/releases/tag/0.7.0) - 2019-12-05
+
+### Added
+
+* Link dataset versions with run inputs
+* Add schema required by tagging
+* More tests for class `common.Utils`
+* Add `ColumnsTest`
+* Add `RunDao.insert()`
+* Add `RunStateDao.insert()`
+* Add custom metrics
+* Add prometheus dep and expose metrics endpoint
+
+### Fixed
+
+* Fix dataset field serialization
+
## [0.6.0](https://github.com/MarquezProject/marquez/releases/tag/0.6.0) - 2019-11-29
### Added
* Add `lombok.config`
* Add code review guidelines
-* Add JobType
+* Add `JobType`
* Add limit and offset support to NamespaceAPI
* Add Development section to `CONTRIBUTING.md`
* Add class **`DatasetMeta`**
