v0.4.2

What's Changed

• fix: clippy deny on empty map struct by @paq in #30
• Apply clippy suggestion by @paq in #31
• refactor: read/write by @nuskey8 in #35
• fix: IOReader::decrement_depth can underflow while SliceReader guards against zero by @paq in #33
• fix: restore reader depth on duplicate key error in map structs by @paq in #34
• chore: bump up to 0.4.2 by @nuskey8 in #36

Full Changelog: v0.4.1...v0.4.2