Released version 3.2.0

• requires PHP 7.2
• Added Nette\Utils\Floats class for comparing floats (#221)
• Arrays: searchKey() silently renamed to getKeyOffset()
• Callback::closure() triggers deprecation notice
• Image: added detectTypeFromFile() and detectTypeFromString()
• Reflection::toString() appends () after function/method name
• Strings::toAscii - triggers E_USER_NOTICE when ext-intl is not present
• renamed Nette\Localization\ITranslator -> Translator, added class alias
• renamed Nette\Utils\IHtmlString -> Nette\HtmlStringable, added class alias