(deps) Replace pascal-case with change-case (Maintained & Lighter)

[jycouet]

This PR replaces the unmaintained pascal-case package with its recommended successor, change-case.

Why?

• [email protected] is outdated, and 4.0.0 is deprecated.
• The author suggests migrating to change-case.
• change-case has 0 dependencies and a smaller total footprint.

Comparison:

Package	Size	Dependencies	Total Size
pascal-case	14KB	2 (no-case 25KB, lower-case 17KB)	56KB
change-case	35KB	0	35KB

---

✅ Net win: Fewer dependencies, lower size, and a more future-proof solution.

[jycouet]

Seemed simple and easy, of course working locally!
I don't know what's wrong there :o :/

[jasonlyu123]

The CI is probably broken because the default environment has changed. It probably failed in the master branch, too. I'll try to fix it later.

[jycouet]

Hooo okay.
Thank you for the info 👍

[jasonlyu123]

Weird... The problem is because change-case is an ESM libary. For some odd reason, the test breaks as long as you import any ESM libary. It probably has something to do with the loader API mocha depends on to run TypeScript tests.

[jycouet]

I'm willing to work on this if you are ok with it :)

[jasonlyu123]

Sure. I haven't figure out a solution or found a upstream issue yet.

[jycouet]

I'm turning and turning and turning, but can't find a solution!
Locally, I don't get the error, you manage to have it ?
You think it's a mocha issue only ? Or the esm/cjs issue will happen also for consumer ?
There is a reason for svelte2tsx to be "type": commonjs ?

[dummdidumm]

FWIW we have a "would be nice" ticket to migrate from mocha to vitest (#2031), maybe that solves that issue (but it obviously is quite the undertaking)

[jycouet]

Let's see tomorrow if I can start something. 🫠

[dummdidumm]

Mhhhm can we do this just yet? change-case is ESM only, and svelte2tsx still supports CJS. The flag in node that makes it possible to use ESM through require is still quite new so not everyone will have it.