fix(deps): update dependency graphql-tools to v6.0.12

Author: renovate-bot

examples/package.json

@@ -25,7 +25,7 @@
     "apollo-server-express": "2.15.1",
     "class-validator": "0.12.2",
     "graphql": "15.2.0",
-    "graphql-tools": "6.0.11",
+    "graphql-tools": "6.0.12",
     "pg": "8.2.1",
     "rimraf": "3.0.2",
     "rxjs": "6.6.0",