Fully supports ES6 #77
Description
...or we can't apply this tool on Gaia.
It looks like to replace the parser library is the only option we could do this, if we don't want to modify the existing one by ourselves. However, the existing code could be kept for the reason of stability. To achieve this, we could use a strategy adapter to let the user of the parser code decide which parser the one would use, and expose one option to switch between them.
Of course if the new parser library is good enough to cover all cases of the existing one, it's OK to migrate to the new one without such capability feature.