Sigmadsp

What's Changed
* Extend the parameter parser for working with safeload registers, and add the first unit tests by elagil in https://github.com/elagil/sigmadsp/pull/18

**Full Changelog**: https://github.com/elagil/sigmadsp/compare/v1.6.0...v1.6.1

What's Changed
* I2C support by m0n5t3r in https://github.com/elagil/sigmadsp/pull/13

New Contributors
* m0n5t3r made their first contribution in https://github.com/elagil/sigmadsp/pull/13

**Full Changelog**: https://github.com/elagil/sigmadsp/compare/v1.5.4...v1.6.0

**Full Changelog**: https://github.com/elagil/sigmadsp/compare/v1.5.2...v1.5.4

Fixed
- version string

**Full Changelog**: https://github.com/elagil/sigmadsp/compare/v1.5.1...v1.5.2

Fixed
- Incorrect version of grpcio

**Full Changelog**: https://github.com/elagil/sigmadsp/compare/1.4.0...1.5.1

Added
- a retry mechanism for the loading parameter file on startup
- more useful logging output
- poetry build
Fixed
- crashes, when optional configuration parameters were missing

**Full Changelog**: https://github.com/elagil/sigmadsp/compare/1.3.4...1.4.0

Added
- DSP pin definitions to the configuration file
- hardware pin control (e.g. for a DSP hard reset)