error parsing response headers

[Nytelife26]

It would appear Cloudflare has added a server-timing entry, as well as Server-Timing, to their response headers.

This is silly because headers are case insensitive, and causes the following issue.

cfRequestDuration;dur=47.999859, cfL4;desc="?proto=TCP&rtt=9805&sent=10&recv=9&lost=0&retrans=0&sent_bytes=6393&recv_bytes=961&delivery_rate=603344&cwnd=190&unsent_bytes=0&cid=91730a7c5440994f&ts=93"
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "/home/nytelife26/projects/cloudflarepycli/cfspeedtest/__main__.py", line 47, in <module>
    cfspeedtest()
  File "/home/nytelife26/projects/cloudflarepycli/cfspeedtest/__main__.py", line 39, in cfspeedtest
    results = CloudflareSpeedtest().run_all()
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/nytelife26/projects/cloudflarepycli/cfspeedtest/cloudflare.py", line 270, in run_all
    self.run_test_latency(test)
  File "/home/nytelife26/projects/cloudflarepycli/cfspeedtest/cloudflare.py", line 244, in run_test_latency
    timers = self.run_test(test)
             ^^^^^^^^^^^^^^^^^^^
  File "/home/nytelife26/projects/cloudflarepycli/cfspeedtest/cloudflare.py", line 235, in run_test
    float(r.headers["Server-Timing"].split("=")[1]) / 1e3
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: could not convert string to float: '47.999859, cfL4;desc'

Since they're case insensitive, it looks like requests is merging them, which breaks our parsing.