* Add swap() methods to Allocator.h
This allows StructureOfArraysBase's move constructor to compile.
Removed an apparent workaround in SingleInstanceComponentManager.
* swap can be noexcept
* Add swap() methods to Allocator.h
This allows StructureOfArraysBase's move constructor to compile.
Co-authored-by: Mathias Agopian <pixelflinger@gmail.com>