travis for 1.6

Author: dehann

.travis.yml

@@ -11,7 +11,7 @@ services:
   - neo4j
 
 julia:
-  - 1.5
+  - 1.6
   - nightly
 
 env:
@@ -26,7 +26,7 @@ branches:
 
 jobs:
   include:
-    - julia: 1.4
+    - julia: 1.6
       env:
         - IIF_TEST=true
         - DO_CGDFG_TESTS=true
@@ -35,7 +35,7 @@ jobs:
       env: DO_CGDFG_TESTS=false
       before_script:
     - stage: "Documentation"
-      julia: 1.4
+      julia: 1.6
       os: linux
       script:
         - julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'