Bump apollo-server-express from 2.8.0 to 2.8.1 in /backend

Created by: Tirokk

Authored by dependabot-preview[bot] Aug 1, 2019 Merged Aug 1, 2019

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Bumps apollo-server-express from 2.8.0 to 2.8.1.

Changelog

Sourced from apollo-server-express's changelog.

v2.8.1

See complete versioning details.

• apollo-engine-reporting: Fix reporting errors which have non-array path fields (eg, non-GraphQLError errors). [PR #3112](https://github-redirect.dependabot.com/apollographql/apollo-server/pull/3112)
• apollo-engine-reporting: Add missing apollo-server-caching dependency. [PR #3054](https://github-redirect.dependabot.com/apollographql/apollo-server/pull/3054)
• apollo-server-hapi: Revert switch from accept and boom which took place in v2.8.0. [PR #3089](https://github-redirect.dependabot.com/apollographql/apollo-server/pull/3089)
• @apollo/gateway: Change the setInterval timer, which is used to continuously check for updates to a federated graph from the Apollo Graph Manager, to be an unref'd timer. Without this change, the server wouldn't terminate properly once polling had started since the event-loop would continue to have unprocessed events on it. [PR #3105](https://github-redirect.dependabot.com/apollographql/apollo-server/pull/3105)
• Switch to using community @types/graphql-upload types.
• apollo-server-fastify: Change the typing of the HTTP response from OutgoingMessage to ServerResponse. Commit
• apollo-server-hapi: Pass the raw request and response objects to graphql-uploads processRequest method to align on the same TypeScript types. Commit

Commits

• 84d80eb Publish
• eb9d07b Update CHANGELOG.md prior to v2.8.1 release.
• 1acf62d apollo-engine-reporting: don't fail if errors have non-array 'path' (#3112)
• e6462c8 Use community provided types for graphql-upload (#2844)
• d7d3613 Add CHANGELOG.md for #3054.
• ce4ce32 Add missing dependency to apollo-engine-reporting (#3054)
• 0d27c58 Revert "Update dependencies accept & boom to new namespace (#30… (#3111)
• e6ccd8b Match (Local|Remote)GraphQLDatasource files to their exported symbols. (#3101)
• 73019e9 fix(@apollo/gateway) Call unref on the federated gateway's `s… (#3105)
• 267cb85 Update mocking.md (#3103)
• Additional commits viewable in compare view

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