🤖 config(xo): Add doc env override.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/make-github-pseudonymous-again/rejuvenate/blob/9b50c2a1d7e9ab7b4bc9c9ff88892e98c5f62244/src/transforms/xo:config-add-doc-env-override.js
Please contact the author of the transform if you believe there was an error.

Author: a-flying-potato

package.json

@@ -212,6 +212,14 @@
     "ignores": [
       "lib",
       "doc"
+    ],
+    "overrides": [
+      {
+        "files": [
+          "doc/**"
+        ],
+        "env": "browser"
+      }
     ]
   }
 }