Update mongoose to version 4.9.8 🚀

[greenkeeperio-bot]

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Hello lovely humans,

mongoose just published its new version 4.9.8.

State	Update 🚀
Dependency	mongoose
New version	4.9.8
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 1386 commits .

• 29eea24 chore: release 4.9.8
• b81d42a style: fix lint
• 923b4d7 perf(schema): remove unnecessary default middleware for subdocs
• 832ef19 perf: trim out some more unnecessary work re: #5191
• b18360c fix(document): set intermediate empty objects for deeply nested undefined paths before path itself
• d1a8e28 test(document): repro #5206
• 549b73e style: fix lint
• a93c2ad fix(document): avoid circular JSON if error in doc array under single nested subdoc
• f7264b7 test(document): repro #5208
• 6fb5802 fix(schema): throw error if first param to schema.plugin() is not a function
• 65dc6c0 perf(document): make validate not re-compute all subdocs if in a subdoc
• eddfe91 docs(subdocs): rewrite subdocs guide
• a5f5069 perf(schema): skip heavy getAllSubdocs if already saving
• f93f65d chore: now working on 4.9.8
• d29a115 chore: release 4.9.7

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