fix: TS5011 errors with TypeScript 6.0: transpileModule called with rootDir: undefined

[errorx666]

fix #1678

[johnnyreilly]

Thanks - I've authorised the test packs to run. This change should validate if this breaks existing behaviour in ts-loader. If it doesn't, then this may be a very straightforward change to make.

Please can you remove the packageManager change for now? Thanks

[johnnyreilly]

Because the execution test pack is so old, it isn't compatible with the breaking changes of TypeScript 6. For now I've dropped next from the test matrix so we can just see if this works for historic TypeScript versions

[errorx666]

Please can you remove the packageManager change for now? Thanks

Done.

[johnnyreilly]

Ah - your force push has removed some of my changes. Let me reapply them

[johnnyreilly]

Before we land this I'd like to get trusted publishing set up: #1680

[johnnyreilly]

Theoretically trusted publishing is now set up. I'll try and merge this and do a release later on probably

[johnnyreilly]

Attempting to publish with trusted publishing for the first time now: https://github.com/TypeStrong/ts-loader/releases/tag/v9.5.5

[johnnyreilly]

This should have published now with v9.5.7 - gosh trusted publishing is hostile https://github.com/TypeStrong/ts-loader/actions/runs/23890002966/job/69660956084