fixes and tests

Author: beneidel

.travis.yml

@@ -1,14 +1,14 @@
 language: node_js
 node_js:
-  - "4"
-  - "8"
-  - "9"
+  - "10"
+  - "12"
+  - "13"
 
 before_install:
+  - "export CHROME_BIN=chromium-browser"
   - "export BROWSERS=Firefox"
-  - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"
-
+services:
+  - xvfb
 after_success:
   - yarn cover-publish
 addons: