Bumps libuast and sdk version

Signed-off-by: ncordon <nacho.cordon.castillo@gmail.com>

Merges python contexts and adds ResultContext encode

Signed-off-by: ncordon <nacho.cordon.castillo@gmail.com>

fix typo introduced by 52b1936

Fix typo in the field name introduced by 52b1936.

Signed-off-by: Denys Smirnov <denys@sourced.tech>

Fix classes for backward compatibility

Signed-off-by: Konstantin Slavnov <konstantin@sourced.tech>

Merge pull request #157 from creachadair/ambience

Derive the libuast os/arch selector from sys.platform.

Merge pull request #154 from creachadair/py36iss153

Require Python ≥ 3.6.

update version of libuast and sdk; update bblfshd used for tests

Signed-off-by: Denys Smirnov <denys@sourced.tech>

ci: upload on success, not on install

Signed-off-by: Denys Smirnov <denys@sourced.tech>

Merge pull request #145 from creachadair/main-re-tain

Switch maintainers for the client-python repository.

Update setup.py