Update dependency jest to v23.6.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
jest (source)	23.5.0 -> 23.6.0

---

Release Notes

jestjs/jest (jest)

v23.6.0

Compare Source

Features

• [jest-cli] Add changedSince to allowed watch mode configs (#​6955)
• [babel-jest] Add support for babel.config.js added in Babel 7.0.0 (#​6911)
• [jest-resolve] Add support for an experimental mapper option (Watchman crawler only) that adds virtual files to the Haste map (#​6940)

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)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.