Update .travis.yml (#123)

cemremengu · mcollina · commit e98f2cf6d0b8 · 2018-10-17T10:59:24.000+02:00
Add windows testing
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,8 @@
 language: node_js
 sudo: false
+os:
+  - windows
+  - linux
 node_js:
 - '6'
 - '8'
