Bump @graphql-codegen/cli from 1.20.1 to 1.21.1

Bumps [@graphql-codegen/cli](https://github.com/dotansimha/graphql-code-generator/tree/HEAD/packages/graphql-codegen-cli) from 1.20.1 to 1.21.1.
- [Release notes](https://github.com/dotansimha/graphql-code-generator/releases)
- [Changelog](https://github.com/dotansimha/graphql-code-generator/blob/master/packages/graphql-codegen-cli/CHANGELOG.md)
- [Commits](https://github.com/dotansimha/graphql-code-generator/commits/@graphql-codegen/cli@1.21.1/packages/graphql-codegen-cli)

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

Author: dependabot[bot]

package-lock.json

@@ -31,7 +31,7 @@
     "vue-template-compiler": "^2.6.12"
   },
   "devDependencies": {
-    "@graphql-codegen/cli": "1.20.1",
+    "@graphql-codegen/cli": "1.21.1",
     "@graphql-codegen/fragment-matcher": "2.0.1",
     "@graphql-codegen/introspection": "1.18.1",
     "@nuxtjs/eslint-config": "^5.0.0",