Update deps and constrain faststream < 0.5

There is an API change with faststream 0.5 that we're not compatible
with:

ImportError while loading conftest '/Users/jsick/code/lsst-sqre/squarebot/server/tests/conftest.py'.
tests/conftest.py:14: in <module>
    from squarebot import main
src/squarebot/main.py:25: in <module>
    from .dependencies.requestcontext import context_dependency
src/squarebot/dependencies/requestcontext.py:10: in <module>
    from ..factory import Factory, ProcessContext
src/squarebot/factory.py:9: in <module>
    from faststream.kafka.asyncapi import Publisher
E   ModuleNotFoundError: No module named 'faststream.kafka.asyncapi'