🤖 chore: Add cover key in .babel.env.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/aureooms/rejuvenate/blob/1fe650dc2407c6c6395828a28777fe8137a3bd2f/src/transforms/package.json:ensure-babel-env-cover.js
Please contact the author of the transform if you believe there was an error.

Author: a-flying-potato

package.json

@@ -120,6 +120,7 @@
           ]
         ]
       },
+      "cover": {},
       "development": {
         "sourceMaps": "inline",
         "presets": [