Prepare for django CMS 3.7 / django 2.2

.travis.yml

@@ -21,6 +21,8 @@ env:
   - DJANGO='django20' CMS='cmsno'
   - DJANGO='django21' CMS='cms36'
   - DJANGO='django21' CMS='cmsno'
+  - DJANGO='django22' CMS='cms36'
+  - DJANGO='django22' CMS='cmsno'
 
 before_install:
   - pip install codecov

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = pep8,isort,docs,py{36,35,27}-django{21,20,111}-cms{36,no},py{36,35,27}-django{111}-cms{35,34}
+envlist = pep8,isort,docs,py{36,35,27}-django{22,21,20,111}-cms{37,no},py{36,35,27}-django{21,20,111}-cms{36,no},py{36,35,27}-django{111}-cms{35,34}
 skip_missing_interpreters = True
 
 [testenv]
@@ -11,12 +11,16 @@ deps=
     django111: django-polymorphic>2.0
     django20: django>=2,<2.1
     django20: django-mptt>0.9,<1.0
-    django20: easy-thumbnails>2.4,<2.6
+    django20: easy-thumbnails>2.5,<2.7
     django20: django-polymorphic>2.0
-    django21: django>=2,<2.1
+    django21: django>=2.1,<2.2
     django21: django-mptt>0.9,<1.0
-    django21: easy-thumbnails>2.4,<2.6
+    django21: easy-thumbnails>2.5,<2.7
     django21: django-polymorphic>2.0
+    django22: django>=2.2rc1,<3.0
+    django22: django-mptt>0.9,<1.0
+    django22: easy-thumbnails>2.5,<2.7
+    django22: django-polymorphic>2.0
     django-filer>1.4,<1.5
     cms34: https://github.com/divio/django-cms/archive/release/3.4.x.zip
     cms34: djangocms-text-ckeditor>=3.5
@@ -27,6 +31,9 @@ deps=
     cms36: https://github.com/divio/django-cms/archive/release/3.6.x.zip
     cms36: djangocms-text-ckeditor>=3.6,<3.8
     cms36: html5lib>=1.0
+    cms37: https://github.com/divio/django-cms/archive/release/3.7.x.zip
+    cms37: djangocms-text-ckeditor>=3.7,<3.9
+    cms37: html5lib>=1.0
     coverage
     aldryn-boilerplates
     -r{toxinidir}/requirements.txt