added Django 3.0 to travis

Author: Gagaro

.travis.yml

@@ -45,6 +45,10 @@ matrix:
     - { python: "3.6", env: DJANGO=2.2 DATABASE=postgres }
     - { python: "3.7", env: DJANGO=2.2 DATABASE=postgres }
 
+    - { python: "3.6", env: DJANGO=3.0 DATABASE=postgres }
+    - { python: "3.7", env: DJANGO=3.0 DATABASE=postgres }
+    - { python: "3.8", env: DJANGO=3.0 DATABASE=postgres }
+
     - { python: "3.5", env: DJANGO=master DATABASE=postgres }
     - { python: "3.6", env: DJANGO=master DATABASE=postgres }
     - { python: "3.7", env: DJANGO=master DATABASE=postgres }

tox.ini

@@ -7,6 +7,7 @@ envlist =
     {py34,py35,py36,py37}-django20,
     {py35,py36,py37}-django21,
     {py35,py36,py37}-django22,
+    {py36,py37,py38}-django30,
     {py35,py36,py37}-djangomaster
 
 [testenv]
@@ -19,6 +20,7 @@ deps =
     django20: Django>=2.0,<2.1
     django21: Django>=2.1,<2.2
     django22: Django>=2.2,<3.0
+    django30: Django>=3.0,<3.1
     djangomaster: https://github.com/django/django/archive/master.tar.gz
     postgres: psycopg2-binary
     argparse
@@ -34,6 +36,7 @@ DJANGO =
     2.0: django20
     2.1: django21
     2.2: django22
+    3.0: django30
     master: djangomaster
 
 DATABASE =