Migrate from Jest to to Vitest, close #104

[Kocal]

See #104

Moving from Jest to Vitest removed ~3k lines in the pnpm lock file and removed ~300 devDependencies 😍 :

• before:

Progress: resolved 1, reused 0, downloaded 0, added 0
Progress: resolved 101, reused 1, downloaded [8](https://github.com/symfony/stimulus-bridge/actions/runs/13020917798/job/36321161304?pr=114#step:6:9)7, added 0
Progress: resolved 251, reused 1, downloaded 214, added 0
Progress: resolved 441, reused 1, downloaded 3[9](https://github.com/symfony/stimulus-bridge/actions/runs/13020917798/job/36321161304?pr=114#step:6:10)0, added 0
Progress: resolved 694, reused 1, downloaded 627, added 0
 WARN  11 deprecated subdependencies found: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
Packages: +7[11](https://github.com/symfony/stimulus-bridge/actions/runs/13020917798/job/36321161304?pr=114#step:6:12)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Progress: resolved 732, reused 1, downloaded 714, added 711, done
.../node_modules/core-js-pure postinstall$ node -e "try{require('./postinstall')}catch(e){}"
.../node_modules/@biomejs/biome postinstall$ node scripts/postinstall.js
.../node_modules/core-js-pure postinstall: Done
.../node_modules/@biomejs/biome postinstall: Done

dependencies:
+ @hotwired/stimulus-webpack-helpers 1.0.1
+ @types/webpack-env 1.18.8
+ loader-utils 3.3.1
+ schema-utils 4.3.0

devDependencies:
+ @babel/core 7.26.7
+ @babel/preset-env 7.26.7
+ @babel/preset-typescript 7.26.0
+ @biomejs/biome 1.9.4
+ @hotwired/stimulus 3.2.2
+ @rollup/plugin-typescript [12](https://github.com/symfony/stimulus-bridge/actions/runs/13020917798/job/36321161304?pr=114#step:6:13).1.2
+ @symfony/mock-module 1.0.0
+ @symfony/stimulus-testing 2.0.1
+ acorn 8.14.0
+ babel-jest 27.5.1 (29.7.0 is available)
+ jest 27.5.1 (29.7.0 is available)
+ rolldown 1.0.0-beta.3
+ tslib 2.8.1
+ typescript 4.9.5 (5.7.3 is available)
+ webpack 5.97.1
+ webpack-cli 5.1.4 (6.0.1 is available)

 WARN  Issues with peer dependencies found
.
└─┬ valibot 1.0.0-beta.12
  └── ✕ unmet peer typescript@>=5: found 4.9.5

Done in 6.3s

• after:

Progress: resolved 1, reused 0, downloaded 0, added 0
Progress: resolved 11[8](https://github.com/symfony/stimulus-bridge/actions/runs/13026638540/job/36336794852?pr=115#step:6:9), reused 1, downloaded 99, added 0
Progress: resolved 284, reused 1, downloaded 243, added 0
Packages: +360
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Progress: resolved 423, reused 1, downloaded 364, added 360, done
.../[email protected]/node_modules/esbuild postinstall$ node install.js
.../node_modules/@biomejs/biome postinstall$ node scripts/postinstall.js
.../[email protected]/node_modules/esbuild postinstall: Done
.../node_modules/@biomejs/biome postinstall: Done

dependencies:
+ @hotwired/stimulus-webpack-helpers 1.0.1
+ @types/webpack-env 1.18.8
+ loader-utils 3.3.1
+ schema-utils 4.3.0

devDependencies:
+ @babel/core 7.26.7
+ @babel/parser 7.26.7
+ @babel/preset-env 7.26.7
+ @babel/preset-typescript 7.26.0
+ @babel/types 7.26.7
+ @biomejs/biome 1.[9](https://github.com/symfony/stimulus-bridge/actions/runs/13026638540/job/36336794852?pr=115#step:6:10).4
+ @hotwired/stimulus 3.2.2
+ @rollup/plugin-typescript 12.1.2
+ @symfony/mock-module 1.0.0
+ @testing-library/jest-dom 6.6.3
+ acorn 8.14.0
+ jsdom 26.0.0
+ json5 2.2.3
+ rolldown 1.0.0-beta.3
+ tslib 2.8.1
+ typescript 4.9.5 (5.7.3 is available)
+ vitest 3.0.4
+ webpack 5.97.1
+ webpack-cli 5.1.4 (6.0.1 is available)

 WARN  Issues with peer dependencies found
.
└─┬ valibot 1.0.0-beta.[12](https://github.com/symfony/stimulus-bridge/actions/runs/13026638540/job/36336794852?pr=115#step:6:13)
  └── ✕ unmet peer typescript@>=5: found 4.9.5

Done in 3.9s

[Kocal]

You won't be missed 👋🏻

But maybe in the future, https://github.com/symfony/stimulus-testing will:

• remove Babel from their dependencies (or put it in peerDeps)
• create subpackages like @symfony/stimulus-testing-jest and @symfony/stimulus-testing-vite?
• or, being deprecated in favor of documentation...