iroh@v0.15.0 - Shut me down

[dignifiedquire]

New release

• Cleaner shutdown
• Improved download coordination, now integrated between documents and blobs
• Smaller tickets
• Binaries are attached to the release
• Musl based universal builds for our linux friends

For more details checkout https://iroh.computer/blog/iroh-0-15-0-shut-me-down