update travis exlcusions for python 3.7 and 2.7

Author: jmcclell

.travis.yml

@@ -35,6 +35,18 @@ cache:
     - $HOME/.cache/pip
 matrix:
   exclude:
+    # Python 3.7 is supported as of django 2.0
+    - {python: "3.6", env: DJANGO="Django<1.3"}
+    - {python: "3.6", env: DJANGO="Django<1.4"}
+    - {python: "3.6", env: DJANGO="Django<1.5"}
+    - {python: "3.6", env: DJANGO="Django<1.6"}
+    - {python: "3.6", env: DJANGO="Django<1.7"}
+    - {python: "3.6", env: DJANGO="Django<1.8"}
+    - {python: "3.6", env: DJANGO="Django<1.9"}
+    - {python: "3.6", env: DJANGO="Django<1.10"}
+    - {python: "3.6", env: DJANGO="Django<1.11"}
+    - {python: "3.6", env: DJANGO="Django<2.0"}
+
     # Python 3.6 is supported as of django 1.8
     - {python: "3.6", env: DJANGO="Django<1.3"}
     - {python: "3.6", env: DJANGO="Django<1.4"}
@@ -77,6 +89,10 @@ matrix:
     - {python: "3.2", env: DJANGO="Django<2.0"}
     - {python: "3.2", env: DJANGO="Django<3.0"}
 
+    # Python 2.7 is supported up until django 2.0
+    - {python: "2.6", env: DJANGO="Django<2.0"}
+    - {python: "2.6", env: DJANGO="Django<3.0"}
+
     # Python 2.6 is supported up until django 1.7
     - {python: "2.6", env: DJANGO="Django<1.8"}
     - {python: "2.6", env: DJANGO="Django<1.9"}