1.2.4

Released: February 22, 2018

• [bug] [orm] Fixed 1.2 regression in ORM versioning feature where a mapping against a
  select() or alias() that also used a versioning column
  against the underlying table would fail due to the check added as part of
  #3673.

  References: #4193

• [bug] [engine] Fixed regression caused in 1.2.3 due to fix from #4181 where
  the changes to the event system involving Engine and
  OptionEngine did not accommodate for event removals, which
  would raise an AttributeError when invoked at the class
  level.

  References: #4190

• [bug] [sql] Fixed bug where CTE expressions would not have their name or alias name
  quoted when the given name is case sensitive or otherwise requires quoting.
  Pull request courtesy Eric Atkin.

  References: #4197