Update the build matrix

.travis.yml

 sudo: false
 language: python
+cache: pip
 python:
-- 2.7
-- 3.6
+- '3.8'
 env:
-- DJANGO="django~=1.8"
-- DJANGO="django~=1.9"
-- DJANGO="django~=1.10"
-- DJANGO="django~=1.11"
-- DJANGO="django~=2.0"
-- DJANGO="django~=2.1"
 - DJANGO="django~=2.2"
 - DJANGO="django~=3.0"
+- DJANGO="django~=3.1"
+- DJANGO="django~=3.2"
+- DJANGO="https://github.com/django/django/archive/main.tar.gz"
 matrix:
-  exclude:
-  - python: 2.7
-    env: DJANGO="django~=2.0"
-  - python: 2.7
-    env: DJANGO="django~=2.1"
-  - python: 2.7
-    env: DJANGO="django~=2.2"
-  - python: 2.7
-    env: DJANGO="django~=3.0"
+  allow_failures:
+  - env: DJANGO='https://github.com/django/django/archive/main.tar.gz'
+
 before_install:
 - pip install codecov
 install:
-- travis_retry pip install $DJANGO django-storages boto3 -e .
+- pip install $DJANGO django-storages boto3 -e .
 script:
 - coverage run --rcfile=.coveragerc runtests.py
 after_success:

setup.py

@@ -40,7 +40,7 @@ setup(
 
     install_requires=[],
     requires=[
-        'Django (>=1.7.4)',
+        'Django (>=1.11)',
     ],
 
     description='Private media file storage for Django projects',
@@ -58,24 +58,22 @@ setup(
     #test_suite = 'runtests',
     zip_safe=False,
     classifiers=[
-        'Development Status :: 4 - Beta',
+        "Development Status :: 5 - Production/Stable",
         'Environment :: Web Environment',
         'Framework :: Django',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: Apache Software License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
         'Framework :: Django',
-        'Framework :: Django :: 1.8',
-        'Framework :: Django :: 1.9',
-        'Framework :: Django :: 1.10',
-        'Framework :: Django :: 1.11',
-        'Framework :: Django :: 2.0',
+        'Framework :: Django :: 2.2',
+        'Framework :: Django :: 3.0',
+        'Framework :: Django :: 3.1',
+        'Framework :: Django :: 3.2',
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
         'Topic :: Software Development :: Libraries :: Application Frameworks',

tox.ini

 [tox]
 envlist=
-    py27-django{18,19,110,111},
-    py36-django{18,19,110,111,20,21,22,30},
+    py38-django{22,31,32},
     # py36-django-dev,
     coverage,
 
@@ -13,22 +12,18 @@ deps =
 [testenv]
 deps =
     {[base]deps}
-    django18: Django ~= 1.8
-    django19: Django ~= 1.9
-    django110: Django ~= 1.10
-    django111: Django ~= 1.11
-    django20: Django ~= 2.0
-    django21: Django ~= 2.1
-    django22: Django ~= 2.2
-    django30: Django ~= 3.0
+    django22: Django~=2.2
+    django30: Django~=3.0
+    django31: Django~=3.1
+    django32: Django~=3.2
     django-dev: https://github.com/django/django/tarball/master
 commands=
     python runtests.py
 
 [testenv:coverage]
-basepython=python3.6
+basepython=python3.8
 deps=
-    django==1.11
+    django~=3.2
     coverage
     {[base]deps}
 commands=