Bump graphql from 15.5.0 to 15.5.1 (#53)

Includes @benjamn's PR graphql/graphql-js#3172,
backported to 15.5.1 by graphql/graphql-js#3186.

Author: dependabot[bot]

package-lock.json

@@ -5,7 +5,7 @@
   "license": "MIT",
   "dependencies": {
     "@apollo/client": "^3.3.20",
-    "graphql": "^15.5.0",
+    "graphql": "^15.5.1",
     "react": "^17.0.2",
     "react-dom": "^17.0.2"
   },