v0.1.0-beta4

• v0.1.0b4 - Addition of dynamic properties
  DOMObject.new_method: Addition of dynamic properties
  DOMObject.set_method: Addition of dynamic properties

• v0.1.0b3 - Project renamed to DOMObjects
  Project: renamed to avoid contflicting project name
  DictGroup: Key name management bug corrected
  Pypi: pyproject.toml added, and general project directory restructure.

• v0.1.0b2 - Additional features
  DOMSchema.keys: Returns all top-level keys