chor(package.json): allow to import modules from dist without extension

Allow to import modules without extension from dist see: rollup#4436 (comment)

package.json

@@ -136,6 +136,6 @@
       },
       "default": "./dist/es/rollup.browser.js"
     },
-    "./dist/*": "./dist/*"
+    "./dist/*": "./dist/*.js"
   }
 }