Update Compat and Change MalignantCoversion Work

[Tctiancan]

If ignore base value, the base value no longer be converted/consume.

[SammySemicolon]

Seems good, could you mirror it to the 1.21 branch?

[SammySemicolon]

What's the purpose of the changes in MalignantConversionHandler? They mess with the math in weird ways it seems.

[Tctiancan]

What's the purpose of the changes in MalignantConversionHandler? They mess with the math in weird ways it seems.

Before, if the base value was 1, MalignantConversion was 0.5, and the value was 1.2, only the 0.2 * 0.5 part increased the target value, but the source attribute multiplied by 50% (1.2 * 0.5 = 0.6), even lower than the base value.
After modification, the source attribute only reduces the part involved in conversion, 0.2 / 1.2 = 1/6, 1.2 * 5/6 * 0.5 = 1.1

[SammySemicolon]

I think the math might be a little off, from my quick testing the change caused regular values to no longer be modified properly