Minimum requirements raised

• Python 3.9 or higher.

For binary PyPI wheel:

• glibc 2.28 or higher. (Debian 10+, Ubuntu 18.10+, CentOS/RHEL 8+)
• pip 20.3 or higher.
• Added 32 bit ARM (armv7l) architecture wheel.

Default bus changes

Previously the default bus always used the context-local variables to store the reference to the current default bus. As it turned out the context tends to be changed a lot which resulted in new buses being opened multiple times. (reported by @wes8ty)

To avoid this the default bus was changed to be thread-local. set_default_bus will now set the thread-local default bus.
A new function set_context_default_bus was added to set the context-local bus. The get_default_bus will return the context-local bus if set or thread-local otherwise. If no default bus has been set a new thread-local bus will be initialized and set.

Code generator

• Code generator will now add manual D-Bus member name override where automatic snake_case to CamelCase does not result in the original member name. This applies to when member renaming options were used. (reported by @nicomuns)
• Generated code will now use Python 3.9 built-in collections type hints. (typing.List[str] -> list[str])
• Fixed blocking generated code adding unexpected result_args_names keyword. (reported by @christophehenry)

Features

• All sdbus.utils.parse functions can now accept the blocking interfaces. (requested by @christophehenry)
• Added boolean use_interface_subsets option to sdbus.utils.parse functions. When enabled the subset of interfaces will be considered a valid match. (requested by @christophehenry)

Fixes

• Fixed exceptions mapped by map_exception_to_dbus_error not being translated from Python to D-Bus errors. This means the Python built-in exceptions will now be properly returned as D-Bus errors when raised in exported object callback. The built-in exceptions translating as added back in version 0.10.0 but probably never worked correctly. (reported by @arkq)
• Fixed not being able to export interfaces with no implemented D-Bus members. This also means export_to_dbus will only access D-Bus related attributes avoiding triggering unrelated @property methods.
• Renamed certain internal classes from Binded to Bound and from DbusSomething to DbusMember. (reported by @souliane, implemented by @dragomirecky)