🤖 chore(package.json): Configure xo.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/aureooms/rejuvenate/blob/17001e676fa44361155baf8a8e44894908dd6c6d/src/transforms/xo:config.js
Please contact the author of the transform if you believe there was an error.

Author: a-flying-potato

package.json

@@ -174,5 +174,30 @@
   },
   "prettier": {
     "trailingComma": "all"
+  },
+  "xo": {
+    "prettier": true,
+    "plugins": [
+      "unicorn"
+    ],
+    "rules": {
+      "unicorn/filename-case": [
+        "error",
+        {
+          "cases": {
+            "camelCase": true,
+            "pascalCase": true
+          }
+        }
+      ]
+    },
+    "overrides": [
+      {
+        "files": [
+          "doc/**"
+        ],
+        "env": "browser"
+      }
+    ]
   }
 }