Musl support

[vliegeois]

With swift 6, one can create Static Linux SDK.
https://www.swift.org/documentation/articles/static-linux-getting-started.html

But, we need to change the direct dependency on GLibc to dependency on both Glibc and Musl.

So, in the different files TOMLArray.swift, TOMLTable.swift, ...:

#if canImport(Darwin)
	import Darwin.C
#elseif canImport(Glibc)
	import Glibc
#elseif canImport(Musl)
    import Musl
#elseif canImport(ucrt)
	import ucrt
#else
	#error("Unsupported Platform")
#endif

[LebJe]

Thanks for the suggestion! I'll create a PR for this and have it as part of the next minor release.