SQLColumnUpdateBuilder.set does not provide options to specify encoding strategies

https://github.com/vapor/sql-kit/blob/f7bbbb022cb52e1828a137bcab2bd1ea2a3e583d/Sources/SQLKit/Builders/SQLColumnUpdateBuilder.swift#L14-L16 `.set(model:)` does not provide a way to specify `SQLQueryEncoder` options. This will be in trouble when dealing with simple Codable types (that is not Fluent type)and have optional properties. motivation is maybe similar to https://github.com/vapor/sql-kit/pull/161 .