* chore: migrate src/helpers.ts to ESM
Doing this means we can avoid the global `types.d.ts` file and export
the interface via ESM instead.
I would ideally like to rewrite the helper module so that it doesn't
export all the functions under the `helper` namespace, but I'll leave
that for a separate PR to keep mechanical changes to one per PR and
easier to review.
* chore: migrate `src/pipetransport` to typescript
Hit one bump in the fact that I want to share an interface across files.
TypeScript only lets you import/export these if you're using ESM, not
CommonJS. So the two options are:
- Migrate to ESM on a per file basis as we do this migration. This won't
affect the output as we output as CommonJS.
- Create a global `types.d.ts` file that we'll use and then migrate to
ESM after.
Right now I've gone for the second option in order to not introduce more
changes in one go. But if we end up finding we have lots of
interfaces/types/etc that we want modules to expose, we might decide
slowly introducing ESM might be a better way forwards.
* Update src/types.d.ts
Co-Authored-By: Mathias Bynens <mathias@qiwi.be>
