feat!: update to iroh@0.30.0 & MSRV 1.81 #118

Job	Run time
Cross Build Only (x86_64-unknown-freebsd)	44s
Cross Test (i686-unknown-linux-gnu)	1m 3s
Android Build Only (aarch64-linux-android)	1m 9s
Android Build Only (armv7-linux-androideabi)	1m 9s
Checking docs	58s
cargo deny	27s
clippy_check	1m 37s
Checking fmt	19s
check_semver	19s
codespell	6s
Minimal Supported Rust Version	55s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 40s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 9s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 10s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	1m 33s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	2m 27s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1m 15s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	1m 20s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	1m 40s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	58s
	21m 58s

Provide feedback