Support Python 3.13 and PostgreSQL 17.

Improvements

• Implement GSSAPI authentication (by @eltoder in 1d4e5680 for [#1122])

• Implement SSPI authentication (by @eltoder in 1aab2094 for [#1128])

• Add initial typings (by @bryanforbes in d42432bf for [#1127])

• Allow building with Cython 3 (by @musicinmybrain in 258d8a95 for [#1101])

• docs: fix connection pool close call (#1125) (by @paulovitorweb in e8488149 for [#1125])

• Add support for the sslnegotiation parameter (by @elprans in afdb05c7 for [#1187])

• Test and build on Python 3.13 (by @elprans in 3aa98944 for [#1188])

• Support PostgreSQL 17 (by @elprans in cee97e1a for [#1189]) (by @MeggyCal in aa2d0e69 for [#1185])

• Add fetchmany to execute many and return rows (by @rossmacarthur in 73f2209d for [#1175])

• Add connect kwarg to Pool to better support GCP's CloudSQL (by @d1manson in 3ee19baa for [#1170])

• Allow customizing connection state reset (#1191) (by @elprans in f6ec755c for [#1191])

Fixes

• s/quote/quote_plus/ in the note about DSN part quoting (by @elprans in 1194a8a6 for [#1151])

• Use asyncio.run() instead of run_until_complete() (by @eltoder in 9fcddfc1 for [#1140])

• Require async_timeout for python < 3.11 (#1177) (by @Pliner in 327f2a7a for [#1177])

• Allow testing with uvloop on Python 3.12 (#1182) (by @musicinmybrain in 597fe541 for [#1182])

• Mark pool-wrapped connection coroutine methods as coroutines (by @elprans in 636420b1 for [#1134])

• handle None parameters in copy_from_query, returning NULL (by @fobispotc in 259d16e5 for [#1180])

• fix: return the pool from _async_init__ if it's already initialized (#1104) (by @guacs in 7dc58728 for [#1104])

• Replace obsolete, unsafe Py_TRASHCAN_SAFE_BEGIN/END (#1150) (by @musicinmybrain in 11101c6e for [#1150])