Restore UNPKG support in package.json

Author: scrhartley

package.json

@@ -23,6 +23,7 @@
   "main": "dist/htmx.esm.js",
   "types": "dist/htmx.esm.d.ts",
   "jsdelivr": "dist/htmx.min.js",
+  "unpkg": "dist/htmx.min.js",
   "web-types": "editors/jetbrains/htmx.web-types.json",
   "scripts": {
     "dist": "./scripts/dist.sh && npm run types-generate && npm run web-types-generate",