remove unneeded ci command

Author: regevbr

.travis.yml

@@ -6,7 +6,6 @@ node_js:
   - "12"
 install:
   - npm install
-  - npm-install-peers
 script:
   - npm run build && npm run cover
 after_script: "cat coverage/lcov.info | node_modules/coveralls/bin/coveralls.js"