• Implement Sum for ByteSize.
• Minimum supported Rust version (MSRV) is now 1.85.

• Fix unit truncation in error strings.

• Add Unit enum.
• Add UnitParseError type.

• Add ByteSize::as_*() methods to return equivalent sizes in KB, GiB, etc.

• Support parsing and formatting exabytes (EB) & exbibytes (EiB).
• Migrate serde dependency to serde_core.

• Add rust-version field to manifest to support MSRV-aware resolvers.

• Add support for precision in Display implementations.

• Add support for no_std targets.
• Use IEC (binary) format by default with Display.
• Use "kB" for SI unit.
• Add Display type for customizing printed format.
• Add ByteSize::display() method.
• Implement Sub<ByteSize> for ByteSize.
• Implement Sub<impl Into<u64>> for ByteSize.
• Implement SubAssign<ByteSize> for ByteSize.
• Implement SubAssign<impl Into<u64>> for ByteSize.
• Reject parsing non-unit characters after whitespace.
• Remove ByteSize::to_string_as() method.
• Remove top-level to_string() method.
• Remove top-level B constant.

• Reject parsing non-unit characters after whitespace.

(yanked)