bugfixes. better error handling

a038ac7 Client: callback when connection is lost
bd53211 fix handling of session_watchdog task
a847e93 make new ruff version happy
bf9ac44 Don't reset attribute_value_callback on write
ec112a8 sync Client parameter updated as in async
6ff4c24 Add server-side session watchdog (#1655)
9aedc20 Resolve timezone deprecation warnings (#1661)
8537ae2 Bump pypa/gh-action-pypi-publish from 1.8.14 to 1.9.0
176c077 Add callback to delete subscriptions (#1656)
6dce240 Stop expired subscriptions
8fc26b8 Fix #1634 Fix SecurityPolicyType docstring: e.g. "None"
-> "NoSecurity" Reorganize imports and better align code to pep standards (ruff)
b543178 Fix type hints to allow Path
b9fa93f Update python versions in setup.py
ff76f20 Bump pytest-asyncio to fix breakage
92dfc73 Bump actions/checkout from 2 to 4
0eacab5 Bump pypa/gh-action-pypi-publish from 1.4.2 to 1.8.14
abacd34 Bump github/codeql-action from 2 to 3
c0f230d Bump actions/setup-python from 3 to 5
81505b4 ci: Add Github actions to Dependabot config
11fde4c ci: update checkout and setup-python actions
f22bac2 Create py.typed
0948605 [xmlimporter] Support to make auto load type definition
s optional
8353920 lib has no attribute X509_V_FLAG_NOTIFY_POLICY problem
because of the new version of cryptography
9074e8c address deprecation warning