Bump graphql from 16.11.0 to 16.12.0 in /demos/graphql-demo/ui (#1665)

Bumps [graphql](https://github.com/graphql/graphql-js) from 16.11.0 to 16.12.0.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](graphql/graphql-js@v16.11.0...v16.12.0)

---
updated-dependencies:
- dependency-name: graphql
  dependency-version: 16.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
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": "^16.11.0",
+    "graphql": "^16.12.0",
     "graphql-tag": "^2.2.0",
     "immutability-helper": "^3.1.1",
     "react": "15.7.0",

demos/graphql-demo/ui/yarn.lock

@@ -2128,10 +2128,10 @@ graphql@^0.10.0, graphql@^0.10.3:
   dependencies:
     iterall "^1.1.0"
 
-graphql@^16.11.0:
-  version "16.11.0"
-  resolved "https://registry.yarnpkg.com/graphql/-/graphql-16.11.0.tgz#96d17f66370678027fdf59b2d4c20b4efaa8a633"
-  integrity sha512-mS1lbMsxgQj6hge1XZ6p7GPhbrtFwUFYi3wRzXAC/FmYnyXMTvvI3td3rjmQ2u8ewXueaSvRPWaEcgVVOT9Jnw==
+graphql@^16.12.0:
+  version "16.12.0"
+  resolved "https://registry.yarnpkg.com/graphql/-/graphql-16.12.0.tgz#28cc2462435b1ac3fdc6976d030cef83a0c13ac7"
+  integrity sha512-DKKrynuQRne0PNpEbzuEdHlYOMksHSUI8Zc9Unei5gTsMNA2/vMpoMz/yKba50pejK56qj98qM0SjYxAKi13gQ==
 
 has-ansi@^2.0.0:
   version "2.0.0"