try to update node

Author: tdhopper

.travis.yml

@@ -9,6 +9,8 @@ python:
   - '3.7'
 notifications:
   email: true
+before_install:
+  - nvm install node 
 install:
   - sudo add-apt-repository --yes ppa:marutter/rrutter3.5
   - sudo apt-get update --yes