Svelte with TDD

Going through Packt's Svelte with TDD book's instructions.

additional setup

Tried npm i -D @testing-library/svelte@^4.2.3 @testing-library/dom@^9.3.4 but instead took stuff from https://github.com/PacktPublishing/Svelte-with-Test-Driven-Development/blob/main/Chapter01/Complete/package.json