fix(deps): update dependency apollo-server-express to v3.12.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
apollo-server-express	3.11.1 -> 3.12.0

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Release Notes

apollographql/apollo-server

### [`v3.12.0`](https://togithub.com/apollographql/apollo-server/compare/apollo-server-express@3.11.1...apollo-server-express@3.12.0) [Compare Source](https://togithub.com/apollographql/apollo-server/compare/apollo-server-express@3.11.1...apollo-server-express@3.12.0)

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