2.1.2

CHANGES:

Fixes:

• Improve error reporting when failing to load a driver (#115).
• Fix validation of dead connection in postgresql driver (#119 by Sam
  Tombury).
• Tolerate exceptions from pool resource allocators (#116 reported by Ryan
  Moore).
• Fix install script for the caqti.opam package to work with caqti.plugin.
• Fix the announced license exception in the caqti-driver-pgx package.

Dependency updates:

• Update to tls >= 1.0.0 for caqti-mirage (#120 by Hannes Mehnert).
• Update tls-eio to >= 0.17.4 for caqti-tls-eio (to eliminate a hack).
• Update async_kernel to >= v0.17.0 and tcpip to >= 8.1.0 (due to
  resolving deprecations for future compatibility).