Sourced from mongoose's changelog.

5.12.12 / 2021-05-28

• fix(documentarray): retain atomics when setting to a new array #10272
• fix(query+model): fix deprecation warning for returnOriginal with findOneAndUpdate() #10298 #10297 #10292 #10285 IslandRhythms
• fix(index.d.ts): make map() result an array if used over an array #10288 quantumsheep

5.12.11 / 2021-05-24

• fix(populate): skip applying setters when casting arrays for populate() to avoid issues with arrays of immutable elements #10264
• perf(schematype): avoid cloning setters every time we run setters #9588
• perf(get): add benchmarks and extra cases to speed up get() #9588
• perf(array): improve array constructor performance on small arrays to improve nested array perf #9588
• fix(index.d.ts): allow using type: [String] with string[] when using SchemaDefinition with generic #10261
• fix(index.d.ts): support ReadonlyArray as well as regular array where possible in schema definitions #10260
• docs(connection): document noListener option to useDb #10278 stuartpb
• docs: migrate raw tutorial content from pug / JS to markdown #10271
• docs: fix typo #10269 sanjib

5.12.10 / 2021-05-18

• fix(query): allow setting defaults option on result documents from query options #7287 IslandRhythms
• fix(populate): handle populating embedded discriminator with custom tiedValue #10231
• fix(document): allow passing space-delimited string of pathsToValidate to validate() and validateSync() #10258
• fix(model+schema): support loadClass() on classes that have collection as a static property #10257 #10254 IslandRhythms
• fix(SchemaArrayOptions): correct property name #10236
• fix(index.d.ts): add any to all query operators to minimize likelihood of "type instantiation is excessively deep" when querying docs with 4-level deep subdocs #10189
• fix(index.d.ts): add $parent() in addition to parent() in TS definitions
• fix(index.d.ts): correct async iterator return type for QueryCursor #10253 #10252 #10251 borfig
• fix(index.d.ts): add virtualsOnly parameter to loadClass() function signature IslandRhythms
• docs(typescript): add typescript populate docs #10212
• docs: switch from AWS to Azure Functions for search #10244

5.12.9 / 2021-05-13

• fix(schema): ensure add() overwrites existing schema paths by default #10208 #10203
• fix(schema): support creating nested paths underneath document arrays #10193
• fix(update): convert nested dotted paths in update to nested paths to avoid ending up with dotted properties in update #10200
• fix(document): allow calling validate() and validateSync() with options as first parameter #10216
• fix(schema): apply static properties to model when using loadClass() #10206
• fix(index.d.ts): allow returning Promise from middleware functions #10229
• fix(index.d.ts): add pre('distinct') hooks to TypeScript #10192

5.12.8 / 2021-05-10

• fix(populate): handle populating immutable array paths #10159
• fix(CastError): add toJSON() function to ensure name property always ends up in JSON.stringify() output #10166 IslandRhythms
• fix(query): add allowDiskUse() method to improve setting MongoDB 4.4's new allowDiskUse option #10177
• fix(populate): allow populating paths under mixed schematypes where some documents have non-object properties #10191
• chore: remove unnecessary driver dynamic imports so Mongoose can work with Parcel #9603
• fix(index.d.ts): allow any object as parameter to create() and insertMany() #10144

... (truncated)

• 4046bee chore: release 5.12.12
• 367e782 fix(documentarray): retain atomics when setting to a new array
• a05c2ef test(documentarray): repro #10272
• e090c5e Merge pull request #10298 from Automattic/gh-10285
• 2f93899 made requested change
• 80c5e0e fixed deprecation warning for collection.findOneAndUpdate
• 4e4bd1a Merge pull request #10288 from quantumsheep/patch-1
• abc3636 .map's ResultType must be an array if used over an array
• b527086 docs: fix search build re: #10271
• b6037fb chore: release 5.12.11
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