Merge #1160

1160: Build docs on Julia 1.3 r=dhairyagandhi96 a=dhairyagandhi96

This causes red CI otherwise

Co-authored-by: Dhairya Gandhi <dhairya@juliacopmuting.com>

.travis.yml

@@ -16,7 +16,7 @@ notifications:
 jobs:
   include:
     - stage: "Documentation"
-      julia: 1
+      julia: 1.3
       os: linux
       script:
         - julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd()));