chore(package): update babel-plugin-transform-async-to-generator to version 6.22.0
chore(package): update babel-plugin-transform-async-to-generator to version 6.22.0

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jamiehodge/express-graphql,graphql/express-graphql,jamiehodge/express-graphql,graphql/express-graphql,wincent/express-graphql,graphql/express-graphql,wincent/express-graphql,jamiehodge/express-graphql,wincent/express-graphql