Update graphql-upload to v10.0.0

[LynchyC]

Update 'singleUpload' tests to reference 'createReadStream' instead of
'stream'

[apollo-cla]

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[LynchyC]

Fixes #3508

[mickeyschwab]

Does it make sense to bump this to 10 given the latest release?

[artonio]

I desperately need this feature, will this be merged soon?

[abernix]

Thanks for opening this PR!

Taking a very quick look at the changelog for graphql-upload, I suspect that landing this upgrade would be a breaking change for the end-user if they haven't made the appropriate changes to their own usage of uploads. If my suspicion is correct, communicating that need would necessitate bumping the major version of Apollo Server accordingly, which the only hesitation in landing this update right now in Apollo Server 2.x.

If someone (@jaydenseric, perhaps?) could dismiss my above suspicion as invalid, then I'd be happy to land this into Apollo Server 2.x. Baring that though, we'd need to wait for a major version bump.

However, since we intend on removing the close coupling between graphql-uploads and Apollo Server in the next major version, as an alternative approach, I'd love to introduce a guide into Apollo Server's documentation which can hopefully demonstrate how to disable the currently baked-in graphql-upload behavior in Apollo Server and show how to use the upstream package directly.

Thoughts?

[abernix]

Superseded/duplicated by #4039