chore!(deps): update dependency defu to v4 (#1373)

May affect some options that were set to undefined. See unjs/defu#29. I've done a manual check and I don't think anything we have in this repo is affected, but double check your auth config for any `undefined` values. If they exist, confirm they continue to work as expected.

Co-authored-by: Renovate Bot <bot@renovateapp.com>

package.json

@@ -42,7 +42,7 @@
     "body-parser": "^1.19.0",
     "consola": "^2.15.3",
     "cookie": "^0.4.1",
-    "defu": "^3.2.2",
+    "defu": "^4.0.1",
     "hasha": "^5.2.2",
     "jwt-decode": "^3.1.2",
     "requrl": "^3.0.2"

yarn.lock

@@ -5226,6 +5226,11 @@ defu@^3.2.2:
   resolved "https://registry.yarnpkg.com/defu/-/defu-3.2.2.tgz#be20f4cc49b9805d54ee6b610658d53894942e97"
   integrity sha512-8UWj5lNv7HD+kB0e9w77Z7TdQlbUYDVWqITLHNqFIn6khrNHv5WQo38Dcm1f6HeNyZf0U7UbPf6WeZDSdCzGDQ==
 
+defu@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/defu/-/defu-4.0.1.tgz#9d7d7a48f9295f08285d153dcff174c89b9bcb22"
+  integrity sha512-lC+G0KvvWRbisQa50+iFelm3/eMmwo4IlBmfASOVlw9MZpHHyQeVsZxc5j23+TQy5ydgEoTVSrWl7ptou1kzJQ==
+
 delayed-stream@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"