Respect explicit keys in upsert builder

Improve MERGE SQL generation and literals

Add soft-delete support to DataMerge

update packages

Add FluentCommand health check package

Merge pull request #764 from loresoft/dependabot/nuget/entityframewor…

…kcore-d534075b4e

Bump Microsoft.EntityFrameworkCore.SqlServer from 10.0.10 to 10.0.11

Make QueryResult<T>.Data read-only with IReadOnlyList<T>

Improve connection state checks in DataSession

Update README.md

Add negated string filter operators