💚 fix travis ci error

Author: kuitos

.travis.yml

@@ -1,19 +1,33 @@
 language: node_js
 node_js:
-  - 8
+  - lts/*
+install:
+  - yarn install
 cache:
   directories:
     - node_modules
 script:
-  - npm run lint
+  - yarn lint
 
 after_success:
-  - npm run codecov
+  - yarn codecov
+
+before_deploy: |
+  function npm_dist_tag() {
+    if [[ "$TRAVIS_TAG" = *"-"* ]]; then
+      echo "next"
+    else
+      echo "latest"
+    fi
+  }
 
 deploy:
+  edge: true
   provider: npm
   email: [email protected]
   api_key: $NPM_AUTH_TOKEN
   skip_cleanup: true
   on:
     tags: true
+  tag: $(npm_dist_tag)
+