Specify dependencies for python < 3.11

Author: sanders41

Pipfile

@@ -14,6 +14,10 @@ tox-pipenv = "*"
 types-requests = "*"
 black = "*"
 isort = "*"
+importlib_metadata = {version = "*", markers="python_version < '3.8'"}
+zipp = {version = "*", markers="python_version < '3.8'"}
+exceptiongroup = {version = "*", markers="python_version < '3.11'"}
+tomli = {version = "*", markers="python_version < '3.11'"}
 
 [packages]
 requests = "*"