Add tox & travis targets for Django 2.2

Author: joehybird

.travis.yml

@@ -1,36 +1,18 @@
 language: python
-matrix:
-    include:
-        - python: 2.7
-          env: TOX_ENV=py27-django18
-        - python: 2.7
-          env: TOX_ENV=py27-django19
-        - python: 2.7
-          env: TOX_ENV=py27-django110
-        - python: 2.7
-          env: TOX_ENV=py27-django111
-
-        - python: 3.4
-          env: TOX_ENV=py34-django18
-        - python: 3.4
-          env: TOX_ENV=py34-django19
-        - python: 3.4
-          env: TOX_ENV=py34-django110
-        - python: 3.4
-          env: TOX_ENV=py34-django111
-
-        - python: 3.5
-          env: TOX_ENV=py35-django18
-        - python: 3.5
-          env: TOX_ENV=py35-django19
-        - python: 3.5
-          env: TOX_ENV=py35-django110
-        - python: 3.5
-          env: TOX_ENV=py35-django111
-
-        - python: 2.7
-          env: TOX_ENV=flake8
-script:
-    - tox -e $TOX_ENV
+dist: xenial
+sudo: true
+services:
+  - postgresql
+python:
+  - 2.7
+  - 3.5
+  - 3.6
+jobs:
+  - include:
+    - python: 3.6
+      env: TOXENV=flake8
 install:
-    pip install tox
+  - pip install tox
+  - pip install -q tox-travis
+script:
+    - tox

tox.ini

@@ -6,23 +6,30 @@
 [tox]
 envlist =
     py{27,34,35}-django{18,19,110,111},
+    py{36}-django{20,21,22},
     flake8
 
 [testenv]
 basepython =
     py27: python2.7
     py34: python3.4
     py35: python3.5
+    py36: python3.6
 deps =
-    django{18,19,110,111}: psycopg2>=2.5.4
+    coverage
+    psycopg2>=2.5.4
     django18: Django>=1.8,<1.9
     django19: Django>=1.9,<1.10
     django110: Django>=1.10,<1.11
-    django111: Django>=1.11,<1.12
+    django111: Django>=1.11,<2.0
+    django20: Django>=2.0,<2.1
+    django21: Django>=2.1,<2.2
+    django22: Django>=2.2,<3.0
 commands =
     pip install -e ./
     pip install -e demo
-    demo test -v2 demo django_genericfilters
+    python -Wd {envbindir}/coverage run --source=django_genericfilters {envbindir}/demo test {posargs:demo django_genericfilters}
+    coverage report -m
 passenv =
     PYTHONPATH
     DJANGO_DB_USER