Format code with yapf

This commit fixes the style issues introduced in 4635bf8 according to the output
from yapf.

Details: https://deepsource.io/gh/kokarare1212/librespot-python/transform/556eb7b2-7632-467e-b1b4-8e463d91a708/

librespot/audio/cdn/CdnFeedHelper.py

@@ -31,7 +31,8 @@ class CdnFeedHelper:
 
         streamer = session.cdn().stream_file(file, key, url, halt_listener)
         input_stream = streamer.stream()
-        normalization_data = NormalizationData.NormalizationData.read(input_stream)
+        normalization_data = NormalizationData.NormalizationData.read(
+            input_stream)
         if input_stream.skip(0xa7) != 0xa7:
             raise IOError("Couldn't skip 0xa7 bytes!")
         return PlayableContentFeeder.PlayableContentFeeder.LoadedStream(

librespot/audio/cdn/CdnManager.py

@@ -159,7 +159,8 @@ class CdnManager:
             else:
                 self._expiration = -1
 
-    class Streamer(GeneralAudioStream.GeneralAudioStream, GeneralWritableStream.GeneralWritableStream):
+    class Streamer(GeneralAudioStream.GeneralAudioStream,
+                   GeneralWritableStream.GeneralWritableStream):
         _session: Session = None
         _streamId: StreamId = None
         _executorService = concurrent.futures.ThreadPoolExecutor()