Sourced from mongoose's changelog.

5.11.8 / 2020-12-14

• fix(index.d.ts): add missing single document populate #9696 YC
• fix(index.d.ts): make options optional for toObject #9700
• fix(index.d.ts): added missing match and model methods in Aggregate class #9710 manekshms
• fix(index.d.ts): make options optional for createIndexes() and ensureIndexes() #9706
• fix(index.d.ts): support passing a function to ValidateOpts.message #9697
• docs: add media query for ::before on headings #9705 #9704 YC

5.11.7 / 2020-12-10

• fix(document): ensure calling get() with empty string returns undefined for mongoose-plugin-autoinc #9681
• fix(model): set isNew to false for documents that were successfully inserted by insertMany with ordered = false when an error occurred #9677
• fix(index.d.ts): add missing Aggregate#skip() & Aggregate#limit() #9692 sahasayan
• fix(index.d.ts): make Document#id optional so types that use id can use Model<IMyType & Document> #9684

5.11.6 / 2020-12-09

• fix(middleware): ensure sync errors in pre hooks always bubble up to the calling code #9659
• fix(index.d.ts): allow passing ObjectId properties as strings to create() and findOneAndReplace() #9676
• fix(index.d.ts): allow calling mongoose.model() and Connection#model() with model as generic param #9685 #9678 sahasayan
• fix(index.d.ts): Fix return type of Model#aggregate() #9680 orgads
• fix(index.d.ts): optional next() parameter for post middleware #9683 isengartz
• fix(index.d.ts): allow array of validators in SchemaTypeOptions #9686 cjroebuck

5.11.5 / 2020-12-07

• fix(map): support null in maps of subdocs #9628
• fix(index.d.ts): support object syntax for validate #9667
• fix(index.d.ts): Allow number for Schema expires #9670 alecgibson
• fix(index.d.ts): allow definining arbitrary properties on SchemaTypeOpts for plugins like mongoose-autopopulate #9669
• fix(index.d.ts): add mongoose.models #9661 #9660 AbdelrahmanHafez
• fix(index.d.ts): allow the next() argument to be optional #9665 #9664 sahasayan
• fix(index.d.ts): add missing VirtualType#applyGetters() and applySetters(), Schema#virtuals, Schema#childSchemas, Query#_mongooseOptions #9658
• fix(index.d.ts): add id to LeanDocuments in case it is defined in the user's schema #9657
• fix(index.d.ts): add missing types for hook functions #9653
• fix(index.d.ts): improve support for strict null checks with upsert and orFail() #9654
• fix(index.d.ts): make return values for insertMany() more consistent #9662
• fix(index.d.ts): Change options in Connection#collection() to be optional #9663 orgads
• fix(index.d.ts): add the missing generic declaration for Schema #9655 sahasayan
• fix(index.d.ts): add missing SchemaTypeOpts and ConnectionOptions aliases for backwards compat
• docs(populate): remove sort() from limit example to avoid potential confusion #9584
• docs(compatibility): add MongoDB server 4.4 version compatibility #9641

5.11.4 / 2020-12-04

• fix(index.d.ts): add Document#__v so documents have a Version by default #9652 sahasayan
• fix(index.d.ts): add missing session option to SaveOptions #9642
• fix(index.d.ts): add Schema#paths, Schema#static(obj), Embedded#schema, DocumentArray#schema, make Schema inherit from EventEmitter #9650
• fix(index.d.ts): order when cb is optional in method #9647 CatsMiaow

... (truncated)

• 2f95f9f chore: release 5.11.8
• 6c90b20 Merge pull request #9710 from manekshms/master
• 6fe409a fix(index.d.ts): make options optional for createIndexes() and `ensureIndex...
• beac486 added missing match and model methods in Aggregate class in type definition file
• bdde2ec Merge pull request #9705 from YC/docs
• d46667a fix(css): media query for ::before on headings
• c657663 fix(index.d.ts): support passing a function to ValidateOpts.message
• 3dbbf7d refactor(index.d.ts): add MongooseQueryOptions type for mongooseOptions() a...
• a053da8 Merge pull request #9700 from orblazer/patch-3
• ccb0f09 Merge pull request #9699 from orblazer/patch-2
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