Revert "Bump graphql from 15.8.0 to 16.1.0"

Author: zqbake

package.json

@@ -18,7 +18,7 @@
     "ajv": "^8.2.0",
     "brace": "^0.11.1",
     "dagre": "^0.8.5",
-    "graphql": "^16.1.0",
+    "graphql": "^15.5.0",
     "jsoneditor": "^9.4.1",
     "jsoneditor-react": "^3.1.1",
     "react": "^17.0.2",