Log Message:
py-apsw: updated to 3.39.4.0

3.39.4.0

Added Connection.cache_stats() to provide more information about the statement cache.

Cursor.execute() now uses sqlite_prepare_v3 which allows supplying flags.

Cursor.execute() has a new can_cache parameter to control whether the query can \ 
use the statement cache. One example use is with authorizers because they only \ 
run during prepare, which doesn’t happen with already cached statements.

(The Cursor.execute() additional parameters are keyword only and also present in \ 
Cursor.executemany(), and the corresponding Connection.execute() and \ 
Connection.executemany() methods.)

Added Cursor.is_readonly, Cursor.is_explain, and Cursor.expanded_sql.

Updated processing named bindings so that types registered with \ 
collections.abc.Mapping (such as collections.UserDict) will also be treated as \ 
dictionaries. (APSW issue 373)