rename `IteratorHelpers` (#139)

Our typical naming pattern is to use the filename without the leading
`_`.

prepare 5.3.0 (#132)

Co-authored-by: Romain Menke <11521496+romainmenke@users.noreply.github.com>
Co-authored-by: Romain Menke <romainmenke@gmail.com>

fix types (#77)

`.d.ts` files need to exist next to `.js` files for them to be auto
detected by Typescript.

Placing type files in their own directory only works when there is only
a single types file or when using `exports`.

Bumps `webdriverio` and vulnerable dependencies `elliptic`, `ws`, and…

… `express` (#67)

This PR resolves `npm audit` findings for `elliptic`, `ws`, and
`express`. As part of this, it bumps `webdriverio` from v8 to v9, which
requires some minor configuration changes.

---------

Co-authored-by: Romain Menke <11521496+romainmenke@users.noreply.github.com>

v5.1.0 (#26)