add npm install

Author: colinfruit

.github/workflows/npm-publish.yml

@@ -25,6 +25,7 @@ jobs:
         with:
           node-version: 12
           registry-url: https://registry.npmjs.org/
+      - run: npm install
       - run: npm publish
         env:
           NODE_AUTH_TOKEN: ${{secrets.npm_token}}
@@ -38,6 +39,7 @@ jobs:
         with:
           node-version: 12
           registry-url: https://npm.pkg.github.com/
+      - run: npm install
       - run: npm publish
         env:
           NODE_AUTH_TOKEN: ${{secrets.GITHUB_TOKEN}}