👷 Use yarn instead of npm

.github/workflows/npm-publish.yml

@@ -14,8 +14,8 @@ jobs:
         with:
           node-version: 12
           registry-url: https://registry.npmjs.org/
-      - run: npm install
-      - run: npm run build
-      - run: npm publish
+      - run: yarn install
+      - run: yarn run build
+      - run: yarn publish
         env:
           NODE_AUTH_TOKEN: ${{secrets.npm_token}}