Add GraphQL v16 support

[monsieurnebo]

Hi,

The v16 release of GraphQL is breaking and seems to be an issue for graphql-request:

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: project-name@1.0.0
npm ERR! Found: graphql@16.0.1
npm ERR! node_modules/graphql
npm ERR!   graphql@"^16.0.1" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer graphql@"14.x || 15.x" from graphql-request@3.6.1
npm ERR! node_modules/graphql-request
npm ERR!   graphql-request@"^3.6.1" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See /Users/username/.npm/eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/username/.npm/_logs/2021-11-05T10_19_29_964Z-debug.log

Do you plan to add the v16 support?

[monsieurnebo]

Thanks @jasonkuhrt 👌