Update jest monorepo to v23.6.0

[renovate[bot]]

This Pull Request renovates the package group "jest monorepo" with the following modifications:

• Updates devDependency babel-jest (source) from v23.4.2 to v23.6.0
• Updates devDependency jest (homepage, source) from v23.5.0 to v23.6.0

Release Notes

facebook/jest

v23.6.0

Features

• [jest-ci] Add changedSince to allowed watch mode configs (#​6955)
• [babel-jest] Add support for babel.config.js added in Babel 7.0.0 (#​6911)

Fixes

• [jest-resolve] Only resolve realpath once in try-catch (#​6925)
• [expect] Fix TypeError in toBeInstanceOf on null or undefined (#​6912)
• [jest-jasmine2] Throw a descriptive error if the first argument supplied to a hook was not a function (#​6917) and (#​6931)
• [jest-circus] Throw a descriptive error if the first argument supplied to a hook was not a function (#​6917) and (#​6931)
• [expect] Fix variadic custom asymmetric matchers (#​6898)
• [jest-cli] Fix incorrect testEnvironmentOptions warning (#​6852)
• [jest-each] Prevent done callback being supplied to describe (#​6843)
• [jest-config] Better error message for a case when a preset module was found, but no jest-preset.js or jest-preset.json at the root (#​6863)
• [jest-haste-map] Catch crawler error when unsuccessfully reading directories (#​6761)

Chore & Maintenance

• [docs] Add custom toMatchSnapshot matcher docs (#​6837)
• [docs] Improve the documentation regarding preset configuration (#​6864)
• [docs] Clarify usage of --projects CLI option (#​6872)
• [docs] Correct failure-change notification mode (#​6878)
• [scripts] Don’t remove node_modules from subdirectories of presets in e2e tests (#​6948)
• [diff-sequences] Double-check number of differences in tests (#​6953)

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This PR has been generated by Renovate Bot.