Update nodejs version in .travis.yml

OrfeasLitos · OrfeasLitos · commit e7cc4fc55a4f · 2021-01-24T12:39:27.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "7"
+  - "15"
 
 install:
   - npm install
