🤖 chore: Add test key in .babel.env.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/aureooms/rejuvenate/blob/a5a57b70ac6fd6fb77fdab32e6b7be7519ce9564/src/transforms/package.json:ensure-babel-env-test.js
Please contact the author of the transform if you believe there was an error.

package.json

@@ -88,7 +88,8 @@
         "sourceMaps": "inline"
       },
       "debug": {},
-      "production": {}
+      "production": {},
+      "test": {}
     }
   }
 }