add npm install in publish.yml

.github/workflows/publish.yml

@@ -14,6 +14,7 @@ jobs:
       uses: actions/setup-node@master
       with:
         node-version: 14.0.0
+    - run: npm install
     - id: publish
       uses: JS-DevTools/npm-publish@v1
       with:
@@ -29,4 +30,4 @@ jobs:
         release_name: Release ${{ steps.publish.outputs.version }}
         body: ${{ steps.publish.outputs.version }}
         draft: false
-        prerelease: false
+        prerelease: false