fix(deps): update dependency graphql to v15.10.1

Author: renovate[bot]

package.json

@@ -9,7 +9,7 @@
   "dependencies": {
     "@prisma/client": "2.12.1",
     "apollo-server": "2.19.0",
-    "graphql": "15.4.0",
+    "graphql": "15.10.1",
     "nexus": "1.0.0",
     "nexus-plugin-prisma": "0.27.0"
   },