Released version 2.4.0

• requires PHP 5.6
• added trait Nette\SmartObject, it differs from Nette\Object:
  • magic properties without @Property annotation are deprecated
  • accessing methods as properties is deprecated
  • extension methods are deprecated
  • magic @methods are deprecated
  • getReflection is deprecated
  • invoking closure in property is deprecated
• added trait Nette\StaticClass
• Html: renamed add() to addHtml(); added addText() (#111)
• Html: deprecated "expanded" attribute data
• Html: added attribute public accessor methods
• Image::place() preserves the alpha channel
• Strings::random() renamed to Random::generate()
• Random: uses random_bytes() on PHP 7
• FileSystem: added read()
• ArrayList: added prepend()
• Json::encode() uses by default JSON_PRESERVE_ZERO_FRACTION (BC break) #89
• DateTime: implements JsonSerializable, formats date in ISO 8601 format accepted by JavaScript's Date object (BC break)
• Filter & RecursiveFilter are deprecated

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