Submodule update to fix `pip install` on Ubuntu 22.04

Submodule update `lib/pycsh_core/` to fix `.pull(decode_error_callback=...)` after it was broken by e94d13bea

Merge branch 'master' into constparam

Add apt update

Actually build with constparam... hopefully

Build with constparam

Add missing `ValueProxy` number operators

Submodule update

Merge branch 'master' of https://github.com/spaceinventor/PyCSH

Fixes and unit-test for `vmem*` functions

Add CI badge to README

Install missing valgrind dep

fdgfgf,lkjæ

Install missing python dep in action

Maybe fetch tags better