6.0.1: PHP 8.5 deprecation fix

• Fixed deprecation warning Non-canonical cast (double) is deprecated,
  use the (float) cast instead in PHP 8.5
  (@thekid)

6.0.0: JSON objects consistency

Heads up: Dropped support for PHP < 7.4, see xp-framework/rfc#343
(@thekid)

• Merged PR #18: Extend Json::read() and Json::write() to accept
  files and streams
  (@thekid)
• Made serialization of integer keys consistent with JSON.stringify()
  (@thekid)
• Merged PR #16: Return {} as empty object instead of empty array
  (@thekid)
• Added PHP 8.5 to test matrix - @thekid

5.1.0: XP 12 compatibility

• Made compatible with XP 12 - @thekid
• Added PHP 8.4 to test matrix - @thekid

5.0.4: Nesting level fix

• Fixed an off-by-one in maximum nesting level calculation - @thekid
• Merged PR #15: Migrate to new testing library - @thekid

5.0.3: WrappedFormat indentation fix

• Merged PR #14: Fix WrappedFormat indentation, fixing #13 - @thekid

5.0.2: PHP 8.2 compatibility fix

• Fixed "Creation of dynamic property" warnings in PHP 8.2 - @thekid

5.0.1: PHP 7.0 / 7.1 fix

• Fixed PHP 7.0 and 7.1 compatibility: Call to undefined function
  spl_object_id(), see https://www.php.net/spl_object_id
  (@thekid)

5.0.0: Drop XP 9, add PHP 8.1, XP 11 compatibility

• Made compatible with PHP 8.1 - add ReturnTypeWillChange attributes to
  iterator, see https://wiki.php.net/rfc/internal_method_return_types
• Implemented xp-framework/rfc#341, dropping compatibility with XP 9
  (@thekid)

4.1.0: I/O string representations

• Fixed up file-based input and output tests to clean up temporary files
  they create as their fixture
  (@thekid)
• Made all of text.json.Format, text.json.Input and text.json.Output
  implement lang.Value and provide string representations
  (@thekid)

4.0.1: Iconv warnings fix

• Fixed warnings from iconv library on Un*x systems - @thekid