chore(deps): update dependency graphql to v16

Author: renovate[bot]

package.json

@@ -27,7 +27,7 @@
     "@types/lodash": "4.14.168",
     "@types/node": "14.14.21",
     "ajv": "7.0.3",
-    "graphql": "15.4.0",
+    "graphql": "16.8.1",
     "jest": "26.6.3",
     "nodemon": "2.0.12",
     "prettier": "2.2.1",