Allow parsing MP3 file-like objects without a .name parameter.

[psobot]

Due to an underlying bug in JUCE's MP3 parser, Pedalboard was previously mis-identifying MP4 streams (and perhaps other formats too) as MP3 files, as long as a valid-looking MP3 header appeared in the first 32kB of the file. Pedalboard would detect this condition and throw an error like:

Failed to open audio file: file does not seem to be of a known or supported format. (If trying to open an MP3 file, ensure the filename ends with '.mp3'.)

...forcing the user to specify a format hint on the file-like object by setting its .name parameter to something that ends with .mp3.

This PR fixes the issue by patching the MP3 parser, which we can now do as we've vendored our own copy as part of #183. After merging and deploying, Pedalboard will no longer require file-like objects containing MP3 data to have .name parameters to parse correctly on Linux or Windows.