Also move testing requirements into packaging setup

setup.py

@@ -46,6 +46,16 @@ setup(
         'database': ['dj-database-url'],
         'email': ['dj-email-url'],
         'search': ['dj-search-url'],
+        'testing': [
+            'django-discover-runner',
+            'mock',
+            'django-cache-url>=1.0.0',
+            'dj-database-url',
+            'dj-email-url',
+            'dj-search-url',
+            'six',
+            'Sphinx>=1.4',
+        ],
     },
     classifiers=[
         'Development Status :: 5 - Production/Stable',
@@ -55,10 +65,9 @@ setup(
         'Operating System :: OS Independent',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.2',
-        'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
         'Topic :: Utilities',
     ],
     zip_safe=False,

tests/requirements.txt

@@ -1,8 +0,0 @@
-django-discover-runner
-mock
-dj-database-url
-dj-email-url
-dj-search-url
-django-cache-url>=1.0.0
-six
-Sphinx>=1.4

tox.ini

@@ -1,8 +1,8 @@
 [tox]
-skipsdist = True
-usedevelop = True
+skipsdist = true
+usedevelop = true
 minversion = 1.8
-whitelist_externals=sphinx-build
+whitelist_externals = sphinx-build
 envlist =
     flake8-py27,
     flake8-py36,
@@ -19,7 +19,6 @@ setenv =
     coverage: COVERAGE_PROCESS_START = {toxinidir}/setup.cfg
     coverage: _TEST_RUN_PREFIX=coverage run
 deps =
-    -rtests/requirements.txt
     dj18: django>=1.8,<1.9
     dj110: django>=1.10,<1.11
     dj111: django>=1.11,<2.0
@@ -29,7 +28,7 @@ deps =
     py27,pypy: mock
     coverage: coverage
     coverage: coverage_enable_subprocess
-
+extras = testing
 commands =
     python --version
     {env:_TEST_RUN_PREFIX:} {envbindir}/django-cadmin test -v2 {posargs:tests}
@@ -49,5 +48,5 @@ commands = flake8 configurations tests
 deps = flake8
 
 [flake8]
-exclude=.tox
-ignore=E501,E127,E128,E124
+exclude = .tox
+ignore = E501,E127,E128,E124