feat: add support for custom wakatime api domain (#620)

* feat: add support for custom wakatime api domain

* Update src/fetchers/wakatime-fetcher.js

* Update src/fetchers/wakatime-fetcher.js

Co-authored-by: 춤추는망고 <ensia96@gmail.com>

Co-authored-by: Nathan Chu <63111210+nthnchu@users.noreply.github.com>
Co-authored-by: 춤추는망고 <ensia96@gmail.com>