25.5b0

What's Changed

• Add DEFAULT & MISSING constants by @josephine-wolf-oberholtzer in #489
• Implement SynthDef.eq by @josephine-wolf-oberholtzer in #490
• dump_tree() sleeps on Windows CI only by @josephine-wolf-oberholtzer in #491
• Cleanup async scsynth processes on exit by @josephine-wolf-oberholtzer in #497
• UGen channel_count must be an integer by @josephine-wolf-oberholtzer in #499

Full Changelog: v25.3b2...v25.5b0