Response must be JSON object, not string

[PhilAndrew]

In azureFunctionsApollo.js line 26:

I had to change from
body: gqlResponse,
to
body: JSON.parse(gqlResponse),

Then it worked correctly. Before this fix the problem was that a string was being returned and not real JSON.

    "apollo-cache-control": "0.0.9",
    "apollo-server-azure-functions": "^1.3.2",
    "apollo-server-core": "^1.3.2",

[apollo-cla]

@PhilAndrew: Thank you for submitting a pull request! Before we can merge it, you'll need to sign the Meteor Contributor Agreement here: https://contribute.meteor.com/

[ross2411]

Please can this PR be approved. Graphiql doesn't appear to work properly without this fix

[abernix]

Thanks for opening this originally, and sorry we didn't get to this sooner. I've gone ahead and cleaned up and merged #753 which was a different take on this which instead utilizes Azure Functions' isRaw attribute, which should have a performance advantage over using JSON.parse for an object which will ultimately be re-stringified before going over the wire.

(I've posted this similar comment to #823, which was another attempt at the same change.)