build(deps): bump graphql in /demos/graphql-demo/ui (#750)

Bumps [graphql](https://github.com/graphql/graphql-js) from 16.7.1 to 16.8.0.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](graphql/graphql-js@v16.7.1...v16.8.0)

---
updated-dependencies:
- dependency-name: graphql
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

demos/graphql-demo/ui/package.json

@@ -4,7 +4,7 @@
   "private": true,
   "dependencies": {
     "apollo-client": "^1.3.0",
-    "graphql": "^16.7.1",
+    "graphql": "^16.8.0",
     "graphql-tag": "^2.2.0",
     "immutability-helper": "^3.1.1",
     "react": "15.7.0",

demos/graphql-demo/ui/yarn.lock

@@ -2130,10 +2130,10 @@ graphql@^0.10.0, graphql@^0.10.3:
   dependencies:
     iterall "^1.1.0"
 
-graphql@^16.7.1:
-  version "16.7.1"
-  resolved "https://registry.yarnpkg.com/graphql/-/graphql-16.7.1.tgz#11475b74a7bff2aefd4691df52a0eca0abd9b642"
-  integrity sha512-DRYR9tf+UGU0KOsMcKAlXeFfX89UiiIZ0dRU3mR0yJfu6OjZqUcp68NnFLnqQU5RexygFoDy1EW+ccOYcPfmHg==
+graphql@^16.8.0:
+  version "16.8.0"
+  resolved "https://registry.yarnpkg.com/graphql/-/graphql-16.8.0.tgz#374478b7f27b2dc6153c8f42c1b80157f79d79d4"
+  integrity sha512-0oKGaR+y3qcS5mCu1vb7KG+a89vjn06C7Ihq/dDl3jA+A8B3TKomvi3CiEcVLJQGalbu8F52LxkOym7U5sSfbg==
 
 has-ansi@^2.0.0:
   version "2.0.0"