ci(travis): add config for travis

Author: Scrum

.travis.yml

@@ -0,0 +1,17 @@
+language: node_js
+
+node_js:
+  - "stable"
+  - "lts/*"
+  - 6
+  - 4
+  - 0.12
+  - 0.10
+
+env:
+  global:
+    - ISTANBUL_COVERAGE: yes
+
+after_success:
+  - npm i coveralls
+  - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js