Ghga-service-chassis-lib

What's Changed
* config to generic dao base by KerstenBreuer in https://github.com/ghga-de/ghga-service-chassis-lib/pull/35
* test utils for s3 by KerstenBreuer in https://github.com/ghga-de/ghga-service-chassis-lib/pull/34


**Full Changelog**: https://github.com/ghga-de/ghga-service-chassis-lib/compare/0.6.0...0.7.0

What's Changed
* specify default config yaml via env var by KerstenBreuer in https://github.com/ghga-de/ghga-service-chassis-lib/pull/28
* added test utils for postgresql by KerstenBreuer in https://github.com/ghga-de/ghga-service-chassis-lib/pull/30
* validate bucket and file ids by KerstenBreuer in https://github.com/ghga-de/ghga-service-chassis-lib/pull/31



**Full Changelog**: https://github.com/ghga-de/ghga-service-chassis-lib/compare/0.5.0...0.6.0

Changelog:
- **Object storage DAO and S3 implementation (GDEV-322)**:
Adds a module that defines a DAO interface for interacting with object storage
backends. Moreover, a specific DAO implementation for S3-compliant services
is provided.
- **added PostgreSQL Connector (GDEV-346)**:
Added a connector class that simplifies the interaction with a PostgreSQL database.
The usage is demonstrated at `./examples/postgresql`.
This example also shows how this connector can be used to implement a use case-specific database DAO.

Changelog:
- added class to handle MongoDB connections
- added a base config class for apps using the pub/sub features
- implemented updates from template repo (incl. code coverage measurement)