🤖 chore: Add test key in .babel.env.

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  - https://github.com/make-github-pseudonymous-again/rejuvenate/blob/8134808bd3e9bcbb3e4b2ca5401e2dee58965a01/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

@@ -117,6 +117,7 @@
           "babel-preset-power-assert"
         ]
       },
+      "test": {},
       "cover": {
         "sourceMaps": "both",
         "presets": [