Add GitHub Actions workflow to update README with NPM version on release

Author: Malnati

.github/workflows/update-readme.yml

@@ -0,0 +1,24 @@
+name: Update README with NPM version
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  update-readme:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Update README with NPM version
+        run: |
+          npm install -g npm
+          VERSION=$(npm info react-use-observe-changes version)
+          sed -i "s/\[!\[npm version\].*]/\[!\[npm version](https:\/\/badge.fury.io\/js\/react-use-observe-changes.svg)](https:\/\/www.npmjs.com\/package\/react-use-observe-changes)/" README.md
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add README.md
+          git commit -m "Update README with NPM version $VERSION"
+          git push