Mongoose 6.2.5发布

fix(mongoose): add isObjectIdOrHexString() to better capture the most common use case for isValidObjectId() #11419

fix(query): prevent modifying discriminator key in updates using operators other than $set #11456

fix(populate+types): call foreignField functions with doc as 1st param, better typings for localField and foreignField functions #11321

fix(populate): return an array when using populate count on an array localField #11307

fix(query): avoid error when using $not with arrays #11467

perf: only deep clone validators if necessary #11412 Uzlopak

fix(types): rename definition files to lowercase to avoid typescript bug #11469

fix(types): aggregate.sort() accepts a string but also { field: 'asc'|'ascending'|'desc'|'descending' } #11479 simonbrunel

fix(types): extract and refactor aggregationcursor and querycursor #11488 Uzlopak

fix(types): extract and refactor schemaoptions #11484 Uzlopak

fix(types): make first param to Query.prototype.populate() a string #11475 minhthinhls

fix(types): improve type checking for doc arrays in schema definitions #11241

docs: fix length comparaison in lean.test.js #11493 zazapeta

docs(timestamps): fix typo #11481 saibbyweb

docs: fix broken link to rawResult #11459 chhiring90