chore(tests): only run windows tests on linux success

Previously we were running windows tests when each of the linux environments would complete. We only
need to do it if all of the linux environments complete. This changes that setting.

Author: jimthedev

.travis.yml

@@ -19,12 +19,12 @@ before_script:
 - curl -Lo travis_after_all.py https://git.io/vLSON
 script:
 - npm run test
-- npm run test:windows
 - npm run check-coverage
 after_success:
 - python travis_after_all.py
 - export $(cat .to_export_back)
 - npm run report-coverage
+- npm run test:windows
 - npm run semantic-release
 env:
   global: