Changelog:
============
-Fixed regression in 2.1.0 where the strconfig argument to load/loads is ignored
-Added main_thread_only execmodel which is derived from the thread execmodel and
only executes remote_exec calls in the main thread.
-The library is now typed and the typing is exposed to type-checkers.
-Re-exported Gateway, Channel, DumpError and LoadError from execnet. The constructors are private.
-Fixed GatewayBase.join() timeout argument getting ignored.
-Removed support for Python 3.7.
-Added official support for Python 3.12.
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>