TypeScriptAsset: Support baseUrl for module resolution

[magcius]

↪️ Pull Request

TypeScript's compiler options allow for supplying a baseUrl where bare module imports will get resolved relative to. This adds support for baseUrl to Parcel.

💻 Examples

{
    "compilerOptions": {
        "baseUrl": "./src"
    }
}

// src/A.ts
import { B } from 'B';

// src/B.ts
export class B {}

[magcius]

Test failure is existing, FYI.

[devongovett]

Thanks for your contribution. I'd like to wait until Parcel 2 to support this as we will have much better support for custom resolvers per-language, and are already planning a TypeScript resolver to implement the TS specific semantics.

[DeMoorJasper]

Gonna close this in favor of resolvers in Parcel 2

[mistricky]

Same problem in Parcel2

[mischnic]

-> #4936