2.7.0

• Fixed flattening in arrays starting with null
• Drop support for HHVM and PHP earlier than 7.2.5.
• Add support for PHP 8.1, 8.2, and 8.3.

2.6.1

• Fixed edge case crash on PHP 8.0.

2.6.0

• Support for PHP 8.0.

2.5.0

• Full support for PHP 7.0-7.4.
• Fixed autoloading when run from within vendor folder.
• Full multibyte (UTF-8) string support.

2.4.0

• Added support for floats when interpreting data.
• Added a function_exists check to work around redeclaration issues.

2.3.0

• Added support for JEP-9,
  including unary filter expressions, and && filter expressions.
• Fixed various parsing issues, including not removing escaped single quotes
  from raw string literals.
• Added support for the map function.
• Fixed several issues with code generation.

2.2.0

• Added support for JEP-12 and raw string literals (e.g., 'foo').

2.1.0

• Added JmesPath\Env::cleanCompileDir() to delete any previously compiled JMESPath expressions.

2.0.0

• Moving to a flattened namespace structure.
• Runtimes are now only PHP callables.
• Fixed an error in the way empty JSON literals are parsed so that they now
  return an empty string to match the Python and JavaScript implementations.
• Removed functions from runtimes. Instead there is now a function dispatcher
  class, FnDispatcher, that provides function implementations behind a single
  dispatch function.
• Removed ExprNode in lieu of just using a PHP callable with bound variables.
• Removed debug methods from runtimes and instead into a new Debugger class.
• Heavily cleaned up function argument validation.
• Slice syntax is now properly validated (i.e., colons are followed by the
  appropriate value).
• Lots of code cleanup and performance improvements.
• Added a convenient JmesPath\search() function.
• IMPORTANT: Relocating the project to https://github.com/jmespath/jmespath.php