Update supported NodeJS versions to current (#291)

cjbarth · web-flow · commit ff0ddae3938d · 2021-03-25T11:59:07.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,8 +2,9 @@ language:
   - node_js
 
 node_js:
-  - "8"
   - "10"
+  - "12"
+  - "14"
 
 before_install:
   - npm install -g gulp-cli
