chore: add missing magicast dep

needed for #2511

Author: pi0

package.json

@@ -140,6 +140,7 @@
     "knitwork": "^1.1.0",
     "listhen": "^1.7.2",
     "magic-string": "^0.30.10",
+    "magicast": "^0.3.4",
     "mime": "^4.0.3",
     "mlly": "^1.7.1",
     "mri": "^1.2.0",