message: Add accessors for the async client
diff: @@ -108,6 +108,18 @@ impl Client {
  pub fn is_closed(&self) -> bool {
  self.0.is_closed()
  }
  +
  + pub fn get_ref(&self) -> &tokio_postgres::Client {
  + &self.0
  + }
  +
  + pub fn get_mut(&mut self) -> &mut tokio_postgres::Client {
  + &mut self.0
  + }
  +
  + pub fn into_inner(self) -> tokio_postgres::Client {
  + self.0
  + }
  }
  impl From<tokio_postgres::Client> for Client {
  