Remove Python 3.5 Support

It's be EOL'd since Sept 2020, so time to ditch it.

Author: jpulec

setup.py

@@ -32,7 +32,6 @@
         'Operating System :: Unix',
         'Topic :: Software Development :: Quality Assurance',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',

tox.ini

@@ -9,7 +9,7 @@ envlist =
     pylint
     readme
     py{36}-django{111,20,-master}
-    py{35,36,37}-django22
+    py{36,37}-django22
     py{36,37,38}-django{30,31}
 
 [testenv]
@@ -20,7 +20,7 @@ commands =
     pylint: pylint --rcfile=tox.ini -d missing-docstring,too-many-branches,too-many-return-statements,too-many-ancestors,fixme --ignore=tests pylint_django setup
     readme: bash -c \'python setup.py -q sdist && twine check dist/*\'
     py{36}-django{111,20,-master}: coverage run pylint_django/tests/test_func.py -v
-    py{35,36,37}-django22: coverage run pylint_django/tests/test_func.py -v
+    py{36,37}-django22: coverage run pylint_django/tests/test_func.py -v
     py{36,37,38}-django{30,31}: coverage run pylint_django/tests/test_func.py -v
     clean: find . -type f -name '*.pyc' -delete
     clean: find . -type d -name __pycache__ -delete
@@ -47,7 +47,7 @@ whitelist_externals =
     django_not_installed: bash
     readme: bash
     py{36}-django{111,20,-master}: coverage
-    py{35,36,37}-django22: coverage
+    py{36,37}-django22: coverage
     py{36,37,38}-django{30,31}: coverage
     clean: find
     clean: rm