Allow charset normalizer >=2 and <3 (#6169)

Author: frenzymadness

setup.cfg

@@ -5,7 +5,7 @@ provides-extra =
     use_chardet_on_py3
 requires-dist =
     certifi>=2017.4.17
-    charset_normalizer~=2.0.0
+    charset_normalizer>=2,<3
     idna>=2.5,<4
     urllib3>=1.21.1,<1.27
 

setup.py

@@ -59,7 +59,7 @@ def run_tests(self):
     sys.exit()
 
 requires = [
-    "charset_normalizer~=2.0.0",
+    "charset_normalizer>=2,<3",
     "idna>=2.5,<4",
     "urllib3>=1.21.1,<1.27",
     "certifi>=2017.4.17",