Core: Bump to python 3.7 with warnings for old global config variables

setup.py

@@ -9,9 +9,10 @@ from volatility3.framework import constants
 with open("README.md", "r", encoding = "utf-8") as fh:
     long_description = fh.read()
 
+
 def get_install_requires():
     requirements = []
-    with open("requirements-minimal.txt", "r", encoding="utf-8") as fh:
+    with open("requirements-minimal.txt", "r", encoding = "utf-8") as fh:
         for line in fh.readlines():
             stripped_line = line.strip()
             if stripped_line == "" or stripped_line.startswith("#"):
@@ -19,6 +20,7 @@ def get_install_requires():
             requirements.append(stripped_line)
     return requirements
 
+
 setuptools.setup(name = "volatility3",
                  description = "Memory forensics framework",
                  version = constants.PACKAGE_VERSION,
@@ -34,7 +36,7 @@ setuptools.setup(name = "volatility3",
                      "Documentation": "https://volatility3.readthedocs.io/",
                      "Source Code": "https://github.com/volatilityfoundation/volatility3",
                  },
-                 python_requires = '>=3.6.0',
+                 python_requires = '>=3.7.0',
                  include_package_data = True,
                  exclude_package_data = {
                      '': ['development', 'development.*'],