vecvec 1.1.0

Improvements

• print() method now respects the max.print option and prevents ALTREP
  materialisation.
• ALTREP vectors are no longer flattened on creation of vecvec objects.

Bug fixes

• Fixed [<- value replacement with NA indices.
• Fixed [<- incorrectly mutating a vecvec when the index selects no
  elements (e.g. x[FALSE] <- NA). The object is now returned unchanged.