Update travis to match parent karma project

hicom150 · hicom150 · commit c642c6b63e29 · 2019-03-18T17:12:26.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,9 +1,8 @@
 language: node_js
 node_js:
-  - 4
-  - 5
-  - 7
+  - 6
   - 8
+  - 10
 
 # Make sure we have new NPM.
 before_install:
