Update .travis.yml (exercism#1557)

wesleydeal · cmccandless · commit 65f2350ffddb · 2018-10-08T14:31:19.000-05:00
Add support for Python 3.7. Fix exercism#1552
diff --git a/.travis.yml b/.travis.yml
@@ -2,14 +2,26 @@ sudo: false
 
 language: python
 
-python:
-  - 2.7
-  - 3.4
-  - 3.5
-  - 3.6
-  - nightly
-
 matrix:
+  include:
+    - python: 2.7
+      dist: trusty
+      sudo: false
+    - python: 3.4
+      dist: trusty
+      sudo: false
+    - python: 3.5
+      dist: trusty
+      sudo: false
+    - python: 3.6
+      dist: trusty
+      sudo: false
+    - python: 3.7
+      dist: xenial
+      sudo: true
+    - python: nightly
+      dist: trusty
+      sudo: false
   allow_failures:
     - python: nightly
 
