v0.3.0

New functionality:

• new functions compositions and shuffle_signbit
• shuffles (and compositions) now support more than two components and can also work on a SmallBitSet. For this to be fast the processor must support the BMI2 instruction set.
• split_rest is now supported for SmallVector and PackedVector, so that in assignments of the form x, w..., y = v the type of w is that of v instead of Vector
• copy is now supported for SmallVector and PackedVector.

Breaking changes:

• the element type for the shuffles iterator has changed