STYLE: Use `unique_ptr` in "SwapWrite" member functions of `ByteSwapper`
STYLE: Use `unique_ptr` in "SwapWrite" member functions of `ByteSwapper`

richardbeare/ITK,BRAINSia/ITK,hjmjohnson/ITK,BRAINSia/ITK,Kitware/ITK,thewtex/ITK,BRAINSia/ITK,richardbeare/ITK,InsightSoftwareConsortium/ITK,InsightSoftwareConsortium/ITK,thewtex/ITK,thewtex/ITK,richardbeare/ITK,Kitware/ITK,hjmjohnson/ITK,BRAINSia/ITK,Kitware/ITK,hjmjohnson/ITK,BRAINSia/ITK,thewtex/ITK,BRAINSia/ITK,hjmjohnson/ITK,hjmjohnson/ITK,hjmjohnson/ITK,thewtex/ITK,thewtex/ITK,Kitware/ITK,Kitware/ITK,thewtex/ITK,InsightSoftwareConsortium/ITK,Kitware/ITK,InsightSoftwareConsortium/ITK,InsightSoftwareConsortium/ITK,Kitware/ITK,hjmjohnson/ITK,InsightSoftwareConsortium/ITK,richardbeare/ITK,richardbeare/ITK,richardbeare/ITK,BRAINSia/ITK,InsightSoftwareConsortium/ITK,richardbeare/ITK