Merge #1066

1066: fix travis for documentation build r=CarloLucibello a=johnnychen94

The previous build doesn't trigger the documentation stage because the matrix doesn't get expanded for the sole job.

Not very clear how Travis reads the config but this change fixes the issue.

😕 weird that it doesn't allow failures on nightly here... The one in my fork works as expected. https://github.com/johnnychen94/Flux.jl/runs/479502998

cc: @CarloLucibello

Co-authored-by: Johnny Chen <johnnychen94@hotmail.com>

.travis.yml

@@ -9,9 +9,8 @@ julia:
   - 1.3
   - nightly
 
-matrix:
+notifications:
-  allow_failures:
+  email: false
-    - julia: nightly
 
 jobs:
   include:
@@ -24,6 +23,9 @@ jobs:
         - julia --project=docs/ docs/make.jl
       after_success: skip
 
+  allow_failures:
+    - julia: nightly
+
 ## uncomment the following lines to override the default test script
 script:
  - julia --color=yes -e 'using Pkg; Pkg.activate(); Pkg.instantiate(); Pkg.test()'