Update dependency graphql to v15.9.0

Author: renovate[bot]

package.json

@@ -58,7 +58,7 @@
     "eslint-plugin-node": "11.1.0",
     "eslint-plugin-promise": "6.1.1",
     "eslint-plugin-vue": "9.21.1",
-    "graphql": "15.8.0",
+    "graphql": "15.9.0",
     "graphql-tag": "2.12.6",
     "jest": "27.5.1",
     "mkdirp": "3.0.1",