run CI on Julia 1.3 (#130)

Author: bicycle1885

.appveyor.yml

@@ -1,7 +1,7 @@
 environment:
   matrix:
   - julia_version: 1.0
-  - julia_version: 1.1
+  - julia_version: 1.3
   - julia_version: latest
 
 matrix:

.travis.yml

@@ -5,7 +5,7 @@ os:
   - osx
 julia:
   - 1.0
-  - 1.1
+  - 1.3
   - nightly
 matrix:
   allow_failures:
@@ -19,7 +19,7 @@ after_success:
 jobs:
   include:
     - stage: "Documentation"
-      julia: 1.1
+      julia: 1.3
       os: linux
       script:
         - julia --project=docs/ docs/setup.jl