Fix dev dependencies

Author: devongovett

packages/@react-spectrum/list/package.json

@@ -64,8 +64,8 @@
   },
   "devDependencies": {
     "@adobe/spectrum-css-temp": "^3.0.0-alpha.1",
-    "@react-aria/dnd": "3.0.0-alpha.5",
-    "@react-stately/dnd": "3.0.0-alpha.4"
+    "@react-aria/dnd": "3.0.0-alpha.6",
+    "@react-stately/dnd": "3.0.0-alpha.5"
   },
   "peerDependencies": {
     "react": "^16.8.0 || ^17.0.0-rc.1",