fix: Use common travis config

LexSwed · LexSwed · commit 9c3c5777ffac · 2020-05-07T13:14:54.000+03:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,6 @@
+version: ~> 1.0
+import: Typeform/travis-shared-config:package-config.yml@master
+
 language: node_js
 
 node_js:
