use yarn install

kiwiupover · kiwiupover · commit eb5bca598b77 · 2020-07-24T10:33:01.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -32,5 +32,4 @@ before_install:
   - cd packages/ember-cli-fastboot
 
 install:
-  - npm install
   - yarn --ignore-engines
