drone npm publish

.drone.yml

@@ -7,3 +7,15 @@ steps:
   commands:
   - yarn install
   - yarn run build
+- name: publish
+  image: plugins/npm
+  settings:
+    username: 
+      from_secret: NPM_USERNAME
+    password:
+      from_secret: NPM_PASSWORD
+    email:
+      from_secret: NPM_EMAIL
+  when:
+    event:
+      - tag