py-mutagen: updated to 1.47.0

1.47.0 - 2023-09-03
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* ID3: Allow reading TYER tags in the form of "yyyy-mm-dd"
* ID3: Handle negative extended header sizes
* ID3: id3 frames fix bad cast due to str.isdigit
* MP3: Auto-detect MP3 files without ID3 tags
* WAVE: Extensible wave format support
* WAVE, AIFF: Handle truncated IFF files
* MP4: add a check for wrong offsets in mp4 files
* FLAC: Fix cuesheet and seektable saving
* TrueAudio: Read sample rate as unsigned and handle zero sample rate
* docs: Fixed documentation for id3.ID3.save parameter v2_version
* docs: Make extlinks compatible with sphinx 6.0
* docs: Fixed various typos
* Add some more type annotations
* Various minor fixes for issues uncovered by oss-fuzz

(adam)