Bump apollo-client from 2.5.1 to 2.6.0 in /webapp

Created by: Tirokk

Authored by dependabot-preview[bot] May 22, 2019 Merged May 24, 2019

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Bumps apollo-client from 2.5.1 to 2.6.0.

Changelog

Sourced from apollo-client's changelog.

Apollo Client (2.6.0)

• In production, invariant(condition, message) failures will now include a unique error code that can be used to trace the error back to the point of failure.
  @​benjamn in #4521

Apollo Client 2.6.0

• If you can be sure your application code does not modify cache result objects (see freezeResults note below), you can unlock substantial performance improvements by communicating this assumption via

  new ApolloClient({ assumeImmutableResults: true })

  which allows the client to avoid taking defensive snapshots of past results using cloneDeep, as explained by @​benjamn in #4543.

• Identical overlapping queries are now deduplicated internally by apollo-client, rather than using the apollo-link-dedup package.
  @​benjamn in commit 7cd8479f

• Avoid updating (and later invalidating) cache watches when fetchPolicy is 'no-cache'.
  @​bradleyayers in [PR #4573](https://github-redirect.dependabot.com/apollographql/apollo-client/pull/4573), part of [issue #3452](https://github-redirect.dependabot.com/apollographql/apollo-client/issues/3452)

• Remove temporary queryId after fetchMore completes.
  @​doomsower in #4440

• Call clearStore callbacks after clearing store.
  @​ds8k in #4695

• Perform all DocumentNode transforms once, and cache the results.
  @​benjamn in #4601

• Accommodate @client [@​export](https://github.com/export) variable changes in ObservableQuery.
  @​hwillson in #4604

• Support the returnPartialData option for watched queries again.
  @​benjamn in #4743

• Preserve networkStatus for incomplete cache-and-network queries.
  @​benjamn in #4765

• Preserve cache-and-network fetchPolicy when refetching.
  @​benjamn in #4840

• Update the React Native docs to remove the request for external example apps that we can link to. We're no longer going to manage a list of external example apps.
  @​hwillson in #4531

• Polling queries are no longer batched together, so their scheduling should be more predictable.
  @​benjamn in #4800

Apollo Cache In-Memory 1.6.0

... (truncated)

Commits

• 6838c5b chore: Publish
• 7eaf413 Merge pull request #4586 from apollographql/release-2.6.0
• 136ce43 Revert "Temporarily publish to npm using the beta tag."
• 6c348e9 Update CHANGELOG.md with final 2.6.0 changes and package versions.
• b64b4e9 chore: Publish
• bcd3aff Preserve cache-and-network fetchPolicy when refetching. (#4840)
• b78bb88 Add a regression test for issue #4841.
• 1268057 Merge branch 'master' into release-2.6.0
• 00261df Run all QueryManager tests (#4842)
• e5c9e9b chore(deps): update dependency gatsby to v2.5.5 (#4836)
• Additional commits viewable in compare view

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