perf(Simulation) qt 0.4.9 for speed update

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I try to use new performance updates from quantum-tensors 0.4.9, see https://github.com/Quantum-Game/quantum-tensors/pull/32.

However, even tests in https://github.com/Quantum-Game/quantum-tensors/blob/master/tests/Photons.test.ts pass (see https://travis-ci.com/github/Quantum-Game/quantum-tensors/builds/181135173) we get errors in the game:

It seems that with each operation, instead of newVec = diffU.mul(oldVec) + oldVec we get newVec = U.mul(oldVec) + oldVec. So that, among other issues:

• if nothing happens, a beam gets multiplied by a factor 2
• if something absorbs a beam, it still goes through it

I look at the errors, and so far it seems that:

this.photons.cachedDiffU in QuantumFrame.ts gives wrong results (instead of only elements, it contains identity). I don't have any idea why.

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Fixed in https://github.com/Quantum-Game/quantum-tensors/pull/34, now connected by #226.

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Adding it before #226. For a starter, we want a minimal connection.