chore: also add "module", for backwards compatibility

Author: ElMassimo

vite-plugin-ruby/package.json

@@ -4,7 +4,8 @@
   "version": "3.2.1",
   "type": "module",
   "main": "./dist/index.js",
-  "types": "dist/index.d.ts",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
   "exports": {
     ".": {
       "import": "./dist/index.js",