Meta-issue to track current state for PHP>=7.0.0

• [FunctionProxy] Invalid handling of variable number of arguments #170 [FunctionProxy] Invalid handling of variable number of arguments
• Make PointcutGrammar class compatible with PHP7 #173 Make PointcutGrammar class compatible with PHP7
• Fix #68422 with incorrect argument reflection info for array_multisort() php/php-src#900 Incorrect reflection info for array_multisort()
• Support parameter scalar typehints for PHP7 #216 Support parameter scalar typehints for PHP7
• Drop support for privileged advices for PHP7.0 #247 Drop support for privileged advices for PHP7.0
• Support variadic methods for classes for PHP5.6 #252 Support variadic methods for classes
• Support return typehints for PHP7 #254 Support return typehints for PHP7