ci(travis): remove "sudo: false" (#138)

Kocal · web-flow · commit 410067367ed2 · 2018-11-19T22:05:45.000+01:00
https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,3 @@
-sudo: false
 dist: trusty
 
 language: node_js
