Environment

Knex version: latest
Database + version: any
OS: any

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If issue is about oracledb support, tag @ atiertant. For MSSql tag @ smorey2.
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If issue is about TypeScript definitions, tag @lorefnon.

Bug

1. Explain what kind of behaviour you are getting and how you think it should do
   knex.batchInsert as for documentation returns knex.QueryBuilder
   actually it is Promise & {returning, transacting}