Improve row decoding performance
This patch was authored and released by @gwynne.
- Leverage new APIs available in PostgresNIO to improve row decoding performance, making up for some speed regressions and then some, especially for queries with lots of result fields.
- Minor improvements to connection handling, also partially courtesy of improved APIs in PostgresNIO.
Note: No new APIs, but marked semver-minor due to requiring an updated minor release of postgres-nio
.