Update joi to version 8.2.0 🚀

[greenkeeperio-bot]

Hello 👋

🚀🚀🚀

joi just published its new version 8.2.0, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of joi – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging 🌴

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The new version differs by 56 commits .

• 1d56f97 8.2.0
• 9bee900 Add Joi.lazy() (fixes #379)
• 709dd50 Add string().truncate() (fixes #833)
• 362b1b7 8.1.1
• 7f91f29 Fix wrong concatSettings order (fixes #900)
• 97221cd 8.1.0
• 6ba9191 Merge branch 'error' into v8
• e3e72c5 Support error override per rule. Closes #882
• 4f8ef50 Update hoek and travis
• c4fd0b2 Merge pull request #871 from cesine/test/string-rejects-integer
• 3a674c3 Merge pull request #868 from RoberMac/patch-1
• ed983c7 Fix:schemacan't callvalidate()method
• ec28a70 added test fail string validation if integer is passed
• 93f9140 8.0.5
• 258e505 Revert "Refs can now generate default even when found"

There are 56 commits in total. See the full diff.

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