audio/wavpack: update to 5.3.0
Changelog [1]:
- fixed: OSS-Fuzz issues 19925, 19928, 20060, 20448
- fixed: trailing garbage characters on imported ID3v2 TXXX tags
- fixed: various minor undefined behavior and memory access issues
- fixed: sanitize tag extraction names for length and path inclusion
- improved: reformat wvunpack "help" and split into long + short versions
- added: regression testing to Travis CI for OSS-Fuzz crashers