v4.0.0

Version 4 is identical to version 3 and just adds support for Go modules.

v3.0.0

• Remove quoting of table and column names introduced in 2.0.0
  (as a consequence, the MapSQL, ReturnSQL, and Quote methods are gone)
• Introduce dialects (replacing DBMS)

Version 3 is not compatible with version 1 and 2.