Fix issue #418 for DeleteAsync (with tests)

* Handle char correctly

* Add PostgreSQL char test

* Test for string before testing for char

v2 work; primarily prep for split SqlClient

Expose the underlying connection from Rainbow Database so it's easier to use Dapper alongside other DB frameworks (#1257)

* Pass LocalBuilders instead of indexes since ILGenerator already optimizes the opcode used

* Eradicate magic local indexes to make refactoring safer

* String and byte[] tuple elements cause InvalidProgramException

* Stop setting current index local which is nonexistent in ValueTuple deserializer

* prep work for adding Microsoft.Data.SqlClient support/tests; SqlClient dependency is not yet removed

* Failing tests for tuples larger than 7

* Special-case IL generation for ValueTuple

* Make value-processing logic available to ValueTuple generation

* fix #1228 - rev sqlclient to 4.6.0
* use transitive deps for SqlClient

When reading Geometry and Geography values from the database, we need to specify the SRID explicitly to retain it in the DbGeometry / DbGeography type. (#1038)

merging, thanks, and sorry for delay

thanks, appreciated