Update the .travis.yml to test the module on both OSX and Windows. Additionally, fix the documentation stage by installing Python + matplotlib (so that plots can be generated with PyPlot).

Author: kernelmethod

.travis.yml

@@ -1,16 +1,15 @@
 language: julia
 
-codecov: true
-coveralls: true
-
 notifications:
   email: false
 
 jobs:
   allow_failures:
     - env: TRAVIS_JULIA_VERSION=nightly
+    - env: TRAVIS_OS_NAME=windows
   include:
-    ### Tests
+    ###### Tests
+    ### Julia 1.3
     - stage: "Test (Julia 1.3)"
       julia: 1.3
       os: linux
@@ -22,17 +21,44 @@ jobs:
         - julia -e 'using Coverage; Coveralls.submit(Coveralls.process_folder());'
         - julia -e 'using Coverage; Codecov.submit(Codecov.process_folder());'
 
+    - stage: # Test (Julia 1.3)
+      julia: 1.3
+      os: osx
+      script:
+        -  julia --color=yes -e 'using Pkg; Pkg.activate(); Pkg.instantiate(); Pkg.test()'
+
+    - stage: # Test (Julia 1.3)
+      julia: 1.3
+      os: windows
+      script:
+        -  julia --color=yes -e 'using Pkg; Pkg.activate(); Pkg.instantiate(); Pkg.test()'
+
+    ### Julia nightly
     - stage: "Test (Julia nightly)"
       julia: nightly
       os: linux
       script:
         -  julia --color=yes -e 'using Pkg; Pkg.activate(); Pkg.instantiate(); Pkg.test()'
 
+    - stage: # Test (Julia nightly)
+      julia: nightly
+      os: osx
+      script:
+        - julia --color=yes -e 'using Pkg; Pkg.activate(); Pkg.instantiate(); Pkg.test()'
+
+    - stage: # Test (Julia nightly)
+      julia: nightly
+      os: windows
+      script:
+        - julia --color=yes -e 'using Pkg; Pkg.activate(); Pkg.instantiate(); Pkg.test()'
+
     ### Documentation generation
     - stage: "Documentation"
       julia: 1.3
+      python: 3.7
       os: linux
       script:
+        - pip install --user matplotlib
         - julia --project=docs -e 'using Pkg; Pkg.instantiate(); Pkg.add(PackageSpec(path=pwd()))'
         - julia --project=docs --color=yes docs/make.jl
       after_success: skip