Merge pull request #166 from JuliaDocsForks/juliadocs/cap-documenter

Cap Documenter.jl to 0.19 on Travis

Author: SimonDanisch

.travis.yml

@@ -14,5 +14,5 @@ matrix:
 notifications:
   email: false
 after_success:
-  - julia -e 'Pkg.add("Documenter")'
+  - julia -e 'ps=Pkg.PackageSpec(name="Documenter", version="0.19"); Pkg.add(ps); Pkg.pin(ps)'
   - julia -e 'cd(Pkg.dir("GPUArrays")); include(joinpath("docs", "make.jl"))'