Export __version__ at the module level (#258)

faster_whisper/__init__.py

@@ -1,10 +1,12 @@
 from faster_whisper.audio import decode_audio
 from faster_whisper.transcribe import WhisperModel
 from faster_whisper.utils import download_model, format_timestamp
+from faster_whisper.version import __version__
 
 __all__ = [
     "decode_audio",
     "WhisperModel",
     "download_model",
     "format_timestamp",
+    "__version__",
 ]