add support for 3.12

[skshetry]

DeprecationWarning is now emitted when named placeholders are used together with parameters supplied as a sequence instead of as a dict. Starting from Python 3.14, using named placeholders with parameters supplied as a sequence will raise a ProgrammingError.

See python/cpython#101693, and discussion on https://discuss.python.org/t/sqlite3-consider-deprecating-combining-named-placeholders-with-sequence-of-params/22450.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (d046e28) 81.52% compared to head (d9f56fc) 81.52%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #28   +/-   ##
=======================================
  Coverage   81.52%   81.52%           
=======================================
  Files          11       11           
  Lines         655      655           
  Branches      111      111           
=======================================
  Hits          534      534           
  Misses        109      109           
  Partials       12       12           

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