=========
Work around changed semantics for error handling when the VFS xDelete
method is asked to delete a file that does not exist.
Completely removed all `AsyncVFS
<https://sqlite.org/asyncvfs.html>`__ related code. This extension
is `no longer maintained nor supported
<https://sqlite.org/src/info/3d548db7eb>`__ by the SQLite team.
`WAL <https://sqlite.org/wal.html>`__ is a good way of getting
similar functionality.
Added :func:`config` support for SQLITE_CONFIG_COVERING_INDEX_SCAN.
Added several new constants: SQLITE_CONFIG_COVERING_INDEX_SCAN,
SQLITE_CONFIG_SQLLOG, SQLITE_FCNTL_BUSYHANDLER,
SQLITE_FCNTL_TEMPFILENAME, SQLITE_CANTOPEN_FULLPATH,
SQLITE_IOERR_DELETE_NOENT