build(deps): bump @hapi/joi from 16.1.7 to 16.1.8 in /backend

Created by: Tirokk

Authored by dependabot-preview[bot] Nov 27, 2019 Merged Nov 27, 2019

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Bumps @hapi/joi from 16.1.7 to 16.1.8.

Commits

• 810db4f 16.1.8
• ffe86f7 Closes #2194
• 7b96290 Test for #2224
• fad61cb Handle literal prefixes in object key deps. Closes #2226
• 1990817 Merge pull request #2228 from jorinvo/patch-1
• 6007f30 Update documentation regarding conditional vs when
• 2ee72f8 Reuse base64 regex. Closes #2218
• 086d438 Enforce pattern match without match. Closes #2205
• f631d5c Cleanup for #2208
• 3de1368 Merge pull request #2208 from everhardt/feat/2207
• Additional commits viewable in compare view

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