Add missing dependency: dataclasses-json (#121)

Author: Philipp Wassibauer

setup.cfg

@@ -21,6 +21,7 @@ packages=find:
 platforms = any
 install_requires =
   aiohttp>=3.8.3
+  dataclasses-json>=0.6.4
   types-python-dateutil>=2.8.19
   types-PyYAML>=6.0.11
   types-requests>=2.28.0