Bump package version to 1.9.0

package.json

@@ -1,7 +1,7 @@
 {
   "main": "dist/alpine.js",
   "name": "alpinejs",
-  "version": "1.8.2",
+  "version": "1.9.0",
   "repository": {
     "type": "git",
     "url": "git://github.com/alpinejs/alpine.git"