Released version 3.4.1

• support for PHP 8.3
• syntax: allowed tab as separator for dashed-blocks
• INF & NAN encoding throws an exception #69

Released version 3.4.0

• requires PHP 8.0
• removed deprecated syntax on/off & \x** (BC break)

Released version 3.3.3

• Encoder: uses more readable single quote strings
• Node::getSubNodes() changed to IteratorAggregate generator,
• Traverser: added DontTraverseChildren & StopTraversal, $enter and $leave callbacks
• Node: added $startLine & $endLine
• Node: startPos & endPos renamed to startTokenPos & endTokenPos
• cs, constants are PascalCase

Released version 3.3.2

• ArrayNode::$indentation usage fixed #63
• ArrayNode split to BlockArrayNode & InlineArrayNode
• InlineArrayNode: added property $bracket
• fixed tests

Released version 3.3.1

• added Neon linter
• added Neon::decodeFile()
• Neon::decode() no longer removes BOM (BC break)
• Neon::encode() $flags replaced with parameters
• Neon, Encoder: added $indentation
• Traverser: can return different nodes

Released version 3.3.0

• completely rewritten parser
• generates AST
• added Traverser
• encoder uses AST

Released version 3.2.2

• uses mb_string when iconv is not available
• improved PHP doc

Released version 3.2.1

• Decoder: fixed \s in unicode, replaced with \n\t_
• Encoder: removed duplicated code (#54)

For the details you can have a look at the diff.

Released version 3.2.0

• now supports only UTF-8 mode and throws exception on invalid input (BC break)
• syntax \xAA is deprecated in favor of \uAAAA (BC break)
• Encoder: encodes multiline strings in """ format

Released version 3.1.2

• Encoder: correctly encodes numeric strings
• Decoder: date-time is not decoded in keys #48

For the details you can have a look at the diff.