Updated automation build scripts

Added dependencies for testenv with tox using requirement-dev.txt
Fixed typo bug for `options.extras_require`
Satisfied setup.py for flake8 and mypy

setup.cfg

@@ -29,7 +29,7 @@ package_dir =
     =clog
 zip_safe = no
 
-[options.extra_require]
+[options.extras_require]
 testing =
     pytest>=7.0
     pytest-cov>=3.0

setup.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 import os
 import sys
+from typing import Dict
 from setuptools import setup
 
 CURRENT_PYVERSION = sys.version_info[:2]
@@ -28,7 +29,7 @@ official Python website to the minimum required version.
     sys.exit(1)
 
 
-info = {}
+info: Dict[str, str] = {}
 here = os.path.abspath(os.path.dirname(__file__))
 with open(os.path.join(here, "clog", "__version__.py"), "r", encoding="utf-8") as f:
     exec(f.read(), info)

tox.ini

@@ -6,6 +6,6 @@ isolated_build = true
 [testenv]
 setenv =
     PYTHONPATH = {toxinidir}
-#deps =
-#    -r{toxinidir}/requirements-dev.txt
-#commands =
+deps =
+    -r{toxinidir}/requirements-dev.txt
+commands =