Add support of Django2.2

Author: YomesInc

.travis.yml

@@ -27,6 +27,8 @@ matrix:
     env: TOXENV=py27-django111
   - python: 3.6
     env: TOXENV=py36-django111
+  - python: 3.6
+    env: TOXENV=py36-django22
   - python: 3.5
     env: TOXENV=py35-django20
   - python: 3.7
@@ -37,6 +39,10 @@ matrix:
     dist: xenial
     sudo: true
     env: TOXENV=py37-django21
+  - python: 3.7
+    dist: xenial
+    sudo: true
+    env: TOXENV=py37-django22
 install:
 - pip install tox
 script:

setup.py

@@ -25,6 +25,7 @@
           "Framework :: Django :: 1.11",
           "Framework :: Django :: 2.0",
           "Framework :: Django :: 2.1",
+          "Framework :: Django :: 2.2",
           "Intended Audience :: Developers",
           "License :: OSI Approved :: MIT License",
           "Programming Language :: Python",

tox.ini

@@ -3,12 +3,12 @@ envlist =
   py{27,34,35,36,37}-core
   py{27,34,35}-django{18,19,110}
   py{27,34,35,36}-django{111}
-  py{36,37}-django{20,21}
+  py{36,37}-django{20,21,22}
 [testenv]
 usedevelop = True
 commands =
   py{27,34,35,36,37}-core: python setup.py test {env:P_ARGS:}
-  py{27,34,35,36,37}-django{18,19,110,111,20,21}: django-admin.py test -v2 django_tests {env:D_ARGS:}
+  py{27,34,35,36,37}-django{18,19,110,111,20,21,22}: django-admin.py test -v2 django_tests {env:D_ARGS:}
 passenv = *
 deps =
   django18: Django>=1.8,<1.9
@@ -17,5 +17,6 @@ deps =
   django111: Django>=1.11,<1.12
   django20: Django>=2.0,<2.1
   django21: Django>=2.1,<2.2
+  django22: Django>=2.2,<2.3
 setenv =
   DJANGO_SETTINGS_MODULE=django_tests.settings