[Feature request] Support for acorn parsing engine

[prashantkamdar]

The default Esprima engine is failing to parse my code.

However, using acorn, I was able to build the AST of my code.

Can you please support acorn?

[hahanov]

@prashantkamdar , Hello, please tell me how to open a file with the result of a json format and display it in graphs, for example, in dot?

--output The output file name into which the result JSON should be saved. (extension: .json)