libschc: update to current master

fragmenter: reinstate RLock to mutex conn for TX

Bump to 0.2.0b0

pylibschc.fragmenter: un/register_send can be a dynamic method

pylibschc.fragmenter: fix non-ACK handling for Fragmenter

Bump to 0.0.1b2

pylibschc.rules: allow for Uncompressed Rule to be unset

gh-actions: deploy: remove unnecessary download-artifact step

gh-actions: seperate pipelines better