fixed travis failing

Author: ZeroX-DG

.travis.yml

@@ -1,11 +1,11 @@
 language: node_js
 node_js:
-  - 7
+  - 13
 before_script:
   - npm install -g jest
 script:
   - npm run lint && npm run test
 sudo: required
 cache:
   directories:
-    - node_modules
+    - node_modules