Yield is broken using generators

[martincpt]

After I tried the examples from the README, I ran into the following issue.

Traceback (most recent call last):
  File "/Users/martin/Code/grpc-playground/rpc/client.py", line 34, in <module>
    for i in yield_data(5):
  File "/Users/martin/Code/grpc-playground/.venv/lib/python3.12/site-packages/rpcpy/client.py", line 193, in wrapper
    event = sse_parser.feed(line)
            ^^^^^^^^^^^^^^^^^^^^^
  File "/Users/martin/Code/grpc-playground/.venv/lib/python3.12/site-packages/rpcpy/client.py", line 222, in feed
    if line[0] == ":":  # ignore comment
       ~~~~^^^
IndexError: string index out of range

[martincpt]

The issue arises with httpx version 0.24 or later, where aiter_lines no longer includes the line break that the current version accounts for. A temporary solution is to install httpx version 0.23.