Updated to use latest versions

.travis.yml

@@ -14,12 +14,12 @@ env:
     - DJANGO_SETTINGS_MODULE="puzzlehunt_server.settings.travis_settings"
     - DB=mysql    
   matrix:
-    - DJANGO=1.8.18
-    - DJANGO=1.9
-    - DJANGO=1.10
-    - DJANGO=1.11
-    - DJANGO=2.0
-    - DJANGO=2.1
+    - DJANGO=1.8.*
+    - DJANGO=1.9.*
+    - DJANGO=1.10.*
+    - DJANGO=1.11.*
+    - DJANGO=2.0.*
+    - DJANGO=2.1.*
 
 matrix:
   exclude:
@@ -40,6 +40,7 @@ install:
   - pip install -q Django==$DJANGO
   - pip install -r requirements.txt
   - pip install coveralls
+  - pip freeze
   - mkdir -p ./media/puzzles
 
 before_script: