v1.2.3.0

Non-breaking

• Add Semigroup/Monoid instances for Mode and IsolationLevel, combining via max with mempty as the weakest value, so composed transaction requirements escalate to the strictest one explicitly requested.

v1.2.2.1

• Conform to the new hasql API (v2.0)

v1.2

• Removed the unpreparedTransaction session because the same effects can now be achieved via the connection settings in Hasql

v1.1

• Add automatic retry on deadlock errors (code 40P01)