chore(workflow): publish to npm on release (#21)

Author: ro-ka

.github/workflows/publish.yml

@@ -6,12 +6,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2.3.1
-    - uses: actions/setup-node@v1.4.2
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v1
       with:
         node-version: '12.x'
-        registry-url: 'https://npm.pkg.github.com'
+        registry-url: 'https://registry.npmjs.org'
     - run: npm install
-    - run: npm publish
+    - run: npm build
+    - run: npm publish --access public
       env:
-        NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}