Log Message:
Update to 1.60

Upstream changes:
1.60 2018-12-01
    - Switched to a production version

1.59_03 2018-11-03
    - Added a note on the long standing bug on TYPE statement
      handle attribute
    - Applied a doc patch on Virtual::PerlData by Björn Höhrmann
      (GH-31)

1.59_02 2018-09-30
    - Upgraded SQLite to 3.25.2

1.59_01 2018-09-17
    - Upgraded SQLite to 3.25.0, with ALTER TABLE ... RENAME COLUMN
      and UPSERT among others
    - Added ::GetInfo (GH#32, Brendan Byrd)
    - Fix to use a PV value as a virtual table column value
      where appropriate (RT-124941)
    - Add deferrability to foreign_key_info (mohawk2)