Try to fix docs

Author: charleskawczynski

.travis.yml

@@ -17,14 +17,11 @@ os:
 julia:
   - 1.2
   - 1.3
-  - nightly
+  allow_failures:
+    - nightly
 notifications:
   email: false
 
-matrix:
-  allow_failures:
-  - julia: nightly
-
 env:
     global:
     - PYTHON=conda
@@ -53,7 +50,7 @@ after_success:
 jobs:
   include:
     - stage: "Documentation"
-      julia: 1.0
+      julia: 1.3
       os: linux
       script:
         - export DOCUMENTER_DEBUG="true"