Bump apollo-server from 2.5.0 to 2.5.1 in /backend

Created by: Tirokk

Authored by dependabot-preview[bot] May 31, 2019 Merged May 31, 2019

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Bumps apollo-server from 2.5.0 to 2.5.1.

Changelog

Sourced from apollo-server's changelog.

v2.5.1

• Upgrade GraphQL Playground to the latest upstream release. This release also includes a new "Query Plan" panel for displaying the query planning results when running the Apollo Gateway.

Commits

• 5814f0a Publish
• 7d3b228 Empty commit for Lerna release.
• 240e897 Publish
• 199cbf2 Update CHANGELOG.md for v2.5.1 release.
• 4a9a71a Cast "editor.cursorShape" type to CursorShape in default settings.
• 9d0fe34 Bump @apollographql/graphql-playground-html to 1.6.20.
• dd7e387 Bump @apollographql/apollo-tools to 0.3.6.
• ffc0054 Publish
• 8b792fe Update GraphQL Playground -html and -react to latest versions.
• See full diff in compare view

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