fix(close #5): missing dist files in npm package (#8)

Author: phatpham9

.github/workflows/publish-npm.yml

@@ -14,6 +14,7 @@ jobs:
         with:
           node-version: 12
           registry-url: https://registry.npmjs.org
+      - run: yarn build
       - run: yarn publish dist --access public
         env:
           NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}