Fix inline graphql highlighting in Vue <script>

[octref]

Reference:

vuejs/vetur#701

(Thanks to @flakeparadigm for the original fix and permission to use it)

Pre:

Now:

TODO:

• Update CHANGELOG.md* with your change (include reference to issue & this PR)
• Make sure all of the significant new logic is covered by tests
• Rebase your changes on master so that they can be merged easily
• Make sure all tests and linter rules pass

*Make sure changelog entries note which project(s) has been affected. See older entries for examples on what this looks like.

[apollo-cla]

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[trevor-scheer]

This is excellent, thanks to both of you for the contribution! 🎉(cc: @flakeparadigm)

We'd love to expand support for Vue across all of our tooling. Would either or both of you be interested in contributing to the CLI? Adding support for our client commands (codegen, push, check) would be amazing! I'd be happy to provide some guidance and work with you if that sounds interesting 😄

[octref]

I wouldn't have much time to contribute, but if there something I can do in https://github.com/vuejs/vetur let me know.