fix issue #2

[JulianGR]

I know that this repo is flagged as "archived", but I thought that it could be helpful for those who are still messing around:

Changes:

• In phpjoern-master/src/util.php, lines 135 to 146 commented because of issues with old flags (as in the in-code comment). Some binary operations might not be correctly exported.
• In phpjoern-master/src/Parser.php:185, we have to change version 30 for 70: new version of internal PHP AST
• In phpjoern-master/src/CSVExporter.php: lines 76, 77, 80 and 81 changed for compatibility of new versions of Neo4j.