Bump graphql from 14.7.0 to 15.3.0

Bumps [graphql](https://github.com/graphql/graphql-js) from 14.7.0 to 15.3.0.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](graphql/graphql-js@v14.7.0...v15.3.0)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -129,7 +129,7 @@
     "css-loader": "^3.4.2",
     "dotenv": "^8.2.0",
     "ejs": "^3.1.3",
-    "graphql": "^14.1.1",
+    "graphql": "^15.3.0",
     "graphql-request": "^1.8.2",
     "husky": "^4.2.5",
     "jasmine-ajax": "3.2.0",