v0.5.0: Neat Nodes

What's Changed

• Fix/docs by @p-snft in #20
• Adhere to graph language by @p-snft in #14
• Fix unit tests by @p-snft in #24
• Split network.network into submodules by @p-snft in #25
• Refine tests by @p-snft in #26
• Add tests for API to add Flows between existing Nodes by @p-snft in #28
• Deprecate child classes of Node by @p-snft in #31
• Feature/custom properties by @p-snft in #32
• Move Node functionality from Entity to Node by @p-snft in #30
• Make energy_system.nodes a dict by @p-snft in #35
• Remove slots and corresponding test by @p-snft in #39
• Make kwargs explicit by @p-snft in #40
• Require label of Node to be given by @p-snft in #43
• Move to setup-python@v5 by @p-snft in #44
• Add warning for experimental node access API by @p-snft in #46

Full Changelog: v0.4.0...v0.5.0