chore(y-indexeddb): add types fields

packages/y-indexeddb/package.json

@@ -15,6 +15,7 @@
     "access": "public",
     "main": "dist/index.umd.cjs",
     "module": "dist/index.js",
+    "types": "dist/index.d.ts",
     "exports": {
       ".": {
         "types": "./dist/index.d.ts",