Allow changing default base when parsing Bytes

[clonejo]

Current behavior:

assert_eq!(Byte::parse_str("1k", true).unwrap().as_u64(), 1000);

For my usecase, i would like to default to base 1024, not base 1000.

For example, ls -lh from GNU coreutils uses 1K for base 1024, and 1kB for base 1000.

[clonejo]

How to do this using the parse-size crate:

parse_size::Config::new().with_binary().parse_size(s)?

[magiclen]

It's not supported at the moment. That feature isn't there yet, but I might include it in a future release.