Fix npm-publish.yml workflow (#90)

Fixes #87

Update `npm-publish.yml` workflow to correctly transpile and publish the application to NPM.

* Add a step to copy `package.json` to the `dist` directory before publishing.
* Modify the `main` and `types` properties in the copied `package.json` to point to the correct files.

.github/workflows/npm-publish.yml

@@ -1,30 +1,33 @@
-# This workflow builds the package and uploads it to the NPM repository
-name: Publish to NPM
-
-# Trigger with every commit on master
-on:
-  push:
-    branches:
-    - master
-
-jobs:
-  build_and_publish_package:
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v4
-
-    - name: Delete node_modules directory
-      run: rm -rf node_modules
-
-    - name: Install dependencies 
-      run: npm ci
-
-    - name: Build
-      run: npm run build
-
-    - name: Publish to npm
-      uses: JS-DevTools/npm-publish@v3
-      with:
-        token: ${{ secrets.NPM_AUTH_TOKEN }}
-        package: dist
+# This workflow builds the package and uploads it to the NPM repository
+name: Publish to NPM
+
+# Trigger with every commit on master
+on:
+  push:
+    branches:
+    - master
+
+jobs:
+  build_and_publish_package:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Delete node_modules directory
+      run: rm -rf node_modules
+
+    - name: Install dependencies 
+      run: npm ci
+
+    - name: Build
+      run: npm run build
+
+    - name: Copy package.json to dist directory
+      run: cp package.json dist && sed -i 's/\"main\": \".*\"/\"main\": \"sportlink-to-mailchimp-converter.umd.js\"/' dist/package.json && sed -i 's/\"types\": \".*\"/\"types\": \"sportlink-to-mailchimp-converter.umd.d.ts\"/' dist/package.json
+
+    - name: Publish to npm
+      uses: JS-DevTools/npm-publish@v3
+      with:
+        token: ${{ secrets.NPM_AUTH_TOKEN }}
+        package: dist