Add musl builds, bump version #249

Job	Run time
Windows - Stable (aarch64, non-host)	1m 49s
Linux - Stable (x86_64-musl, non-host)	1m 45s
macOS - Stable (x86_64, non-host)	46s
Linux - Stable (aarch64, non-host)	1m 58s
Linux - Stable (aarch64-musl, non-host)	2m 9s
Windows - MSRV	8m 51s
macOS - MSRV	2m 38s
Linux - MSRV	2m 22s
Linux - Beta	2m 27s
Windows - Nightly	9m 29s
Linux - Nightly	2m 23s
Windows - Beta	8m 43s
Linux - Stable (x86_64)	2m 28s
Windows - Stable (x86_64)	9m 33s
macOS - Nightly	2m 5s
macOS - Stable (aarch64)	2m 21s
macOS - Beta	2m 47s
Create GitHub Release	0s
	1h 4m 34s

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