🤖 chore: Add production key in .babel.env.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/make-github-pseudonymous-again/rejuvenate/blob/8134808bd3e9bcbb3e4b2ca5401e2dee58965a01/src/transforms/package.json:ensure-babel-env-production.js
Please contact the author of the transform if you believe there was an error.

package.json

@@ -145,7 +145,8 @@
             }
           ]
         ]
-      }
+      },
+      "production": {}
     }
   }
 }