Add datasette-graphql recipe

[andersy005]

Checklist

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[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/datasette-graphql) and found it was in an excellent condition.

[andersy005]

@conda-forge/help-python, this is ready for review 🙂

[andersy005]

@conda-forge/help-python, the gentlest of bumps on this for review when you get a moment.

[andersy005]

@conda-forge-admin, please ping team

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-webservice.

I was asked to ping @conda-forge/staged-recipes and so here I am doing that.