Update mongoose to version 4.9.0 🚀

[greenkeeperio-bot]

Hello lovely humans,

mongoose just published its new version 4.9.0.

State	Update 🚀
Dependency	mongoose
New version	4.9.0
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 1150 commits .

• e43cdf1 chore: release 4.9.0
• 36b6ced Merge pull request #4977 from Automattic/4925
• 386918a Merge pull request #5066 from Automattic/4.9
• 566b9e8 Merge pull request #5018 from Automattic/4983
• b40c187 Merge pull request #5024 from Automattic/4290
• 336b0ee Merge pull request #5039 from Automattic/5026
• f6acdb2 Merge pull request #5040 from Automattic/5027
• 27e461e Merge pull request #5065 from Automattic/3998
• 4aeb6e9 Merge branch '4.9' into 4983
• c3d7429 Merge branch 'master' into 4.9
• cdaad77 chore: now working on 4.8.8
• 5c22152 chore: release 4.8.7
• 03e1062 fix(populate): handle passing no args to query.populate
• 165de1c test(populate): repro #5036
• 06d8509 docs: improve bulkWrite docs

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

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