- update to 0.17.34
* Python 3.12 also loads C version when using `typ='safe'`
* initial support for loading invoking `__post_init__` on dataclasses
that have that method after loading a registered dataclass
(`@yaml.register_class\n@dataclass\nclass ...`)
* fix issue with scanner getting stuck in infinite loop
* added `flow_seq_start`, `flow_seq_end`, `flow_seq_separator`,
`flow_map_start`, `flow_map_end`, `flow_map_separator` **class**
attributes to the `Emitter` class so flow style output
can more easily be influenced