enableOrNameAndArgs = enableOrNameAndArgs ?? 'help [command]'; ^ SyntaxError: Unexpected token '?'

[a-t-0]

Thank you for your work on this and for sharing it. Would you perhaps be able to include instructions on how to run/use your work?

I get:

home/a/git/solidity-graph-puml/node_modules/commander/lib/command.js:380
    enableOrNameAndArgs = enableOrNameAndArgs ?? 'help [command]';
                                               ^

SyntaxError: Unexpected token '?'
    at wrapSafe (internal/modules/cjs/loader.js:915:16)
    at Module._compile (internal/modules/cjs/loader.js:963:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14)
    at Module.require (internal/modules/cjs/loader.js:887:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/home/a/git/solidity-graph-puml/node_modules/commander/index.js:2:21)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    ```
    
When I run:"

node index.js --input-path /home/some_path/src/DecentralisedInvestmentManager.sol --output-file eg.puml