fix: update Travis CI

Author: smakosh

.travis.yml

@@ -4,20 +4,23 @@ language: node_js
 node_js:
   - 12
 
+install:
+  - yarn
+
 cache:
   directories:
     - ~/.npm
 notifications:
   email: false
 
 before_install:
-  - npm i && npm i codecov.io coveralls
+  - yarn && yarn add codecov.io coveralls
 
 after_success:
   - cat ./coverage/lcov.info | ./node_modules/codecov.io/bin/codecov.io.js
   - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
-  - npm run build
-  - npm run travis-deploy-once "npm run semantic-release"
+  - yarn run build
+  - yarn run travis-deploy-once "yarn run semantic-release"
 
 branches:
   only:

package.json

@@ -18,6 +18,7 @@
     "prepare": "tsdx build",
     "size": "size-limit",
     "analyze": "size-limit --why",
+    "travis-deploy-once": "travis-deploy-once",
     "semantic-release": "semantic-release"
   },
   "peerDependencies": {