Add Type Annotation For ConnectionInterpreter

[cosmir17]

I am trying to do 1.0.0-RC2 to RC4 upgrade and I got the following message.

[error] ClassInProjectThatUsesDoobie:76:13: incompatible type in overriding
[error] def getTypeMap: cats.data.Kleisli[F,java.sql.Connection,java.util.Map[String,Class[_]]] (defined in trait Visitor)
[error]   with override def getTypeMap: cats.data.Kleisli[F,java.sql.Connection,java.util.Map[String,Class[_ <: Object]]] (defined in trait ConnectionInterpreter);
[error]  found   : cats.data.Kleisli[F,java.sql.Connection,java.util.Map[String,Class[_ <: Object]]]
[error]  required: cats.data.Kleisli[F,java.sql.Connection,java.util.Map[String,Class[_]]]
[error]         new ConnectionInterpreter {
[error]             ^
[error] one error found

[cosmir17]

I asked @jatcwang for help and he created a github plan page :#1889
However, he seems busy. For that reason, I have worked on this PR. I don't know how to link this PR to the github page.
Can you review, please @jatcwang 🙏

[jatcwang]

Hi @cosmir17 thanks for the PR. Sorry I was not able to review in time but now I have something more complete. Please take a look at #1929 and let me know what you think :)