yarn dtslint tests/types-dtslint fails with a Syntax error

[johnhunter]

Running yarn dtslint tests/types-dtslint results in a syntax error for me.

/Users/[...]/.dts/typescript-installs/4.3/node_modules/typescript/lib/typescript.js:139
    for (let i = startIndex ?? 0; i < array.length; i++) {

Which suggests dtslint does not support nullish coalescing?

Have tried with [email protected] and latest [email protected]. The repo has been archived and the project rolled into definitely typed. Not sure where that leaves us.

[johnhunter]

Tried using the latest @definitelytyped/dtslint. Engine incompatibilities meant upgrading node to 14 volta pin node@14. However now get a thrown error

The 'strict-export-declare-modifiers' rule threw an error in '[...]/professional-ts/tests/types-dtslint/test.ts':
TypeError: ts.getModifiers is not a function

It outputs the test fails as expected but also expects a types-dtslint/tsconfig.eslint.json file and gives a parsing error as the file is not found.

I think the repo dependencies need to be updated and breaking changes resolved.