What's Changed
* docs: Fix docstring of `ContextDiagram` by ewuerger in https://github.com/DSD-DBS/capellambse-context-diagrams/pull/206
* test: Split tests into collect, layout and serialization by ewuerger in https://github.com/DSD-DBS/capellambse-context-diagrams/pull/208
* fix!: Fix blackbox mode, improve structure and use custom collector mode by huyenngn in https://github.com/DSD-DBS/capellambse-context-diagrams/pull/207
**Full Changelog**: https://github.com/DSD-DBS/capellambse-context-diagrams/compare/v0.7.3...v0.7.4