Merge pull request #1706 from bdunne/update_travis_dist

Switch to Ubuntu bionic, see: ManageIQ/manageiq#21472

Author: kbrock

.travis.yml

@@ -1,12 +1,13 @@
+---
 language: node_js
 node_js:
-- "12"
+- '12'
 cache:
   yarn: true
   directories:
   - node_modules
 after_script:
- - cat reports/coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
+- cat reports/coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
 notifications:
   webhooks:
     urls:
@@ -20,3 +21,4 @@ install: yarn
 script:
 - bin/setup
 - rake test
+dist: bionic