Fix Travis config warnings

.travis.yml

@@ -5,7 +5,7 @@ node_js:
   # so that your addon works for all apps
   - "10"
 
-sudo: false
+os: linux
 dist: trusty
 
 addons:
@@ -19,7 +19,7 @@ env:
   global:
     # See https://git.io/vdao3 for details.
     - JOBS=1
-  matrix:
+  jobs:
     # we recommend new addons test the current and previous LTS
     # as well as latest stable release (bonus points to beta/canary)
     - EMBER_TRY_SCENARIO=ember-lts-2.16-ember-simple-auth-1.6
@@ -48,7 +48,7 @@ env:
     - EMBER_TRY_SCENARIO=ember-canary-ember-simple-auth-2.0
     - EMBER_TRY_SCENARIO=ember-canary-ember-simple-auth-3.0
 
-matrix:
+jobs:
   fast_finish: true
   allow_failures:
     - env: EMBER_TRY_SCENARIO=ember-canary-ember-simple-auth-1.6