build: allow postinstall script for core-js@3.50.0

- Add allowScripts entry for core-js@3.50.0 in package.json so
  its postinstall lifecycle script is permitted during install

Signed-off-by: objecttothis <17935339+objecttothis@users.noreply.github.com>

package.json

@@ -80,5 +80,8 @@
     },
     "publishConfig": {
         "registry": "https://npm.pkg.github.com/"
+    },
+    "allowScripts": {
+        "core-js@3.50.0": true
     }
 }