6.4.3 / 2022-07-05

• fix(document): handle validating deeply nested subdocuments underneath nested paths with required: false #12021
• fix(types): infer schematype type from schema paths when calling SchemaType.path() #11987
• fix(types): add $top and $topN aggregation operators #12053
• fix(types): clean up a couple of issues with $add and $ifNull #12017
• fix(types): allow $cond with $in #12028
• docs: add path level descending index example in docs #12023 MitchellCash
• docs: add Buffer, Decimal128, Map to docs #11971