• requires PHP 7.1
• uses declare(strict_types=1)
• uses PHP 7.1 scalar and return type hints
• Object, ObjectMixin: silently marked as deprecated
• added PhpStorm metadata for autocompletion

Changes

• Strings::before(), after(), indexOf() and pos() return NULL instead of FALSE if the needle was not found
• Arrays::searchKey() returns NULL instead of FALSE when item is not found
• Image::save() and send() throws ImageException on failure (BC break)
• Validators::assertField: first argument has type hint array
• Callback::toReflection() removed support for Nette\Reflection
• some classes & members marked as final
• ITranslator: allow multiple parameters for translated messages (#178)
• deprecated ObjectMixin::getSuggestion()
• MemberAccessException extends from Error (BC break)
• removed StaticClassException, StaticClass throws Error
• Image::save() $file cannot be null, added output()
• DateTime: removed setTimestamp() and getTimestamp(), big int are supported in x64 PHP versions
• Strings::findPrefix accepts only string[] (BC break)
• Removed Nette\Object & ObjectMixin (BC break)
• Callback::invoke() and invokeArgs() are deprecated in favor of native invocation
• Callback: deprecated closure()
• Validators::everyIs: first argument has typehint iterable (BC break)
• Strings::normalize() a compare() dependency on Normalizer is optional
• Strings::normalize() a compare() normalize strings into UTF-8 NFC (#150)
• Filesystem::write() accept NULL in $mode parameter (#139)