Bump graphql-subscriptions from 1.1.0 to 1.2.1
Bump graphql-subscriptions from 1.1.0 to 1.2.1

Bumps [graphql-subscriptions](https://github.com/apollostack/graphql-subscriptions) from 1.1.0 to 1.2.1.
- [Release notes](https://github.com/apollostack/graphql-subscriptions/releases)
- [Changelog](https://github.com/apollographql/graphql-subscriptions/blob/master/CHANGELOG.md)
- [Commits](https://github.com/apollostack/graphql-subscriptions/commits)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
davidyaha/graphql-redis-subscriptions,davidyaha/graphql-redis-subscriptions