Update tox to support 111

Author: Pamela McA'Nulty

README.rst

@@ -14,7 +14,7 @@ A `coverage.py`_ plugin to measure the coverage of Django templates.
 
 Supported Python versions are 2.7, 3.4, 3.5 and 3.6.
 
-Supported Django versions are 1.8 through 1.11b1.
+Supported Django versions are 1.8 through 1.11.
 
 Supported coverage.py versions are 4.0 and higher.
 
@@ -59,6 +59,10 @@ plural text, so both are marked as used if the tag is used.
 Changes
 ~~~~~~~
 
+v1.5.1a --- 2017-04-05
+---------------------
+
+Validates support for Django version 1.11.
 
 v1.5.0 --- 2017-02-23
 ---------------------

tox.ini

@@ -14,10 +14,10 @@
 
 [tox]
 envlist =
-    py27-django{18,19,110,110tip,111tip},
-    py34-django{18,19,110,110tip,111tip,tip},
-    py35-django{18,19,110,110tip,111tip,tip},
-    py36-django{18,19,110,110tip,111tip,tip},
+    py27-django{18,19,110,111,111tip,tip},
+    py34-django{18,19,110,111,111tip,tip},
+    py35-django{18,19,110,111,111tip,tip},
+    py36-django{18,19,110,111,111tip,tip},
     check,doc
 
 [testenv]
@@ -26,7 +26,7 @@ deps =
     django18: Django >=1.8, <1.9
     django19: Django >=1.9, <1.10
     django110: Django >=1.10, <1.11
-    django110tip: https://github.com/django/django/archive/stable/1.10.x.tar.gz
+    django111: Django >=1.11, <2.0
     django111tip: https://github.com/django/django/archive/stable/1.11.x.tar.gz
     djangotip: https://github.com/django/django/archive/master.tar.gz