SyntaxError: Unexpected token ?

[Andrew-M-C]

Ubuntu 20.04，按照 README 说明放了 3d0d7e5fb2ce288813306e4d4636395e047a3d28 和 31bb7ba8914766d4ba40d6dfb6113c8b614be442 两个文件之后，执行 npm run cli，报错：

> ios-message-export@1.0.0 cli /root/projects/github.com/harrisoff/ios-message-export
> npm run build&&node dist/cli/index.js


> ios-message-export@1.0.0 build /root/projects/github.com/harrisoff/ios-message-export
> tsc -p .

/usr/local/lib/node_modules/typescript/lib/tsc.js:93
  for (let i = startIndex ?? 0; i < array.length; i++) {
                           ^

SyntaxError: Unexpected token ?
    at Module._compile (internal/modules/cjs/loader.js:723:23)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/typescript/bin/tsc:2:1)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! ios-message-export@1.0.0 build: `tsc -p .`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the ios-message-export@1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2024-04-01T01_26_41_454Z-debug.log
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! ios-message-export@1.0.0 cli: `npm run build&&node dist/cli/index.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the ios-message-export@1.0.0 cli script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2024-04-01T01_26_41_482Z-debug.log

不会 typescript，求大佬帮忙看看？