build: only run on node 10 (#130)

MarshallOfSound · web-flow · commit a581d76ddb4c · 2019-02-13T15:35:54.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -5,10 +5,7 @@ cache:
 notifications:
   email: false
 node_js:
-  - '9'
-  - '8'
-  - '6'
-  - '4'
+  - '10'
 after_success:
   - npm run semantic-release
 branches:
