Update mongoose to version 4.9.6 🚀

[greenkeeperio-bot]

Hello lovely humans,

mongoose just published its new version 4.9.6.

State	Update 🚀
Dependency	mongoose
New version	4.9.6
Type	dependency

This version is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of mongoose.
Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

Do you have any ideas how I could improve these pull requests? Did I report anything you think isn’t right?
Are you unsure about how things are supposed to work?

There is a collection of frequently asked questions and while I’m just a bot, there is a group of people who are happy to teach me new things. Let them know.

Good luck with your project ✨

You rock!

🌴

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The new version differs by 2207 commits .

• ca446b5 chore: release 4.9.6
• 5fe1296 Merge pull request #5192 from jhob/gh-5189
• 2fcd595 Merge pull request #5178 from milesbarr/patch-1
• 159ac94 Merge pull request #5172 from tzellman/master
• a2addca fix(model): modify discriminator() class in place
• 1237132 test: repro #5175
• 147e605 docs(model): fix replaceOne example for bulkWrite
• bfd3b00 fix(document): repro and fix for gh-5189
• 190374a fix(document): don't create a new array subdoc when creating schema array
• d467f05 test(document): repro #5162
• b5fa384 fix: upgrade mongodb -> 2.2.26
• b13b09b fix(model): merge query hooks from discriminators
• 115e85d test(model): repro #5147
• 7f6d459 Update schematype.js
• 551c0a7 fix(document): add parent() function to subdocument to match array subdoc

There are 250 commits in total. See the full diff.

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