See: https://github.com/kulshekhar/ts-jest/blob/main/CHANGELOG.md#deprecations
See: jestjs/jest#12089

I'm not exactly sure why as `ts-jest` looks to be implementing Jest's
`SyncTransform` type properly.

No alternative is provided, so this would break things anyways unless
a dependent project provided its own transform. This unambiguously makes
`ts-jest` the default transform and project can always explicitly override
the transform in its `jest.config`