configure package.json to emit typescript declarations

[quachc]

Proposal to fix #285.
Sadly, tsc fails because of private classes which are (implicitly?) imported.
Execute npm run ts-declarations (I didn't use Yarn) to show the error messages.

You can change --outFile dist/index.d.ts to --outDir dist/types to generate .d.ts files for each JavaScript file.

[bjornharrtell]

Hmm interesting.. so there could be value to let tsc compile and create the type declarations even if those would be "any" all over the place (I guess?)

[quachc]

It kinda slipped my mind, but you can do a lot with JSDoc (which I believe you already migrate from JavaDoc); https://www.typescriptlang.org/docs/handbook/jsdoc-supported-types.html

[bjornharrtell]

@quachc I don't think it's less work to process and generate jsdoc vs generate TS directly, the latter being more desirable. Both require a serious effort though.