ci(travis): use build config validation (beta) [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/97
2019-11-13 16:53:13 +00:00 · 2019-11-13 16:53:13 +00:00 · 85593f555e
commit 85593f555e
parent ef7e1c1e7b
1 changed files with 1 additions and 0 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -3,6 +3,7 @@
 ---
 ## Machine config
 dist: bionic
+version: '~> 1.0'
 sudo: required
 services:
  - docker