kmongo-3.11.2

The kotlinx.serialization mapping is now considered production ready. Look at the performance benchmark.

• #141 Remove kotlin-reflect dependency (see documentation )
• #154 register custom serializers for kotlinx.serialization
• #156 propagate create index exception in ensureIndex
• #157 Filter for enum value fails with Can't find a codec for class
• #158 improves kotlinx.serialization performance
• #159 kotlinx.serialization: support update without null properties