Consider dropping the Microsoft.Data.SqlClient dependency

[0xced]

It's here only to support the CreateAsync and ResetAsync overloads that take a connection string instead of a connection.

It's a real shame to take a dependency on Microsoft.Data.SqlClient if you only ever plan to use this on PostgreSQL or MySQL for example.

It's also less of a maintenance burden (see also #142) to not have that dependency.

Of course that would require a major release since it's a breaking change.

Finally, it would be very smooth along with #151.

[drusellers]

I noticed that I'm getting build warnings about Azure.Identity and that warning comes from Respawn and its dependency on this lib. Not sure what the correct approach is but would be nice to get this out of my logs. :)

15>MessageAid.Tests.csproj: Warning NU1903 : Package 'Azure.Identity' 1.3.0 has a known high severity vulnerability, https://github.com/advisories/GHSA-5mfx-4wcx-rv27
15>MessageAid.Tests.csproj: Warning NU1902 : Package 'Azure.Identity' 1.3.0 has a known moderate severity vulnerability, https://github.com/advisories/GHSA-m5vv-6r4h-3vj9
15>MessageAid.Tests.csproj: Warning NU1902 : Package 'Azure.Identity' 1.3.0 has a known moderate severity vulnerability, https://github.com/advisories/GHSA-wvxc-855f-jvrv