Move dev dependencies to requirements-dev.txt

requirements-dev.txt

@@ -5,3 +5,7 @@ pytest==6.2.4
 pytest-mock==3.6.1
 responses==0.12.1
 twine==3.2.0
+
+jsonschema==3.2.0
+toposort==1.6
+dataclasses==0.8;python_version<'3.7'

requirements.txt

 requests==2.28.1
 tenacity==6.2.0
-jsonschema==3.2.0
-toposort==1.6
-dataclasses==0.8;python_version<'3.7'