Update to V1.0.0beta1 of nikic/php-parser and implement in/compatibility with PHP 5.6 language features
Fixes and updates for variadics implementation
Implement support and tests for power (**) binary and assignment operator
Add explicit tests for used functions and constants with scalar expressions
Remove *::class in tests for PHP 5.4 support
Add missing ** assignment operator parsing test
Merge pull request #14 from TimeToogo/new-php-parser

Upgrade php-parser with PHP 5.6 language feature compatibility