Merge pull request #5822 from bangerth/copyright

Update copyright years.

diff --cc include/deal.II/base/array_view.h
Simple merge

diff --cc include/deal.II/base/mpi.h
Simple merge

diff --cc include/deal.II/base/mpi.templates.h
Simple merge

diff --cc include/deal.II/base/synchronous_iterator.h
Simple merge

diff --cc include/deal.II/base/time_stepping.templates.h
Simple merge

diff --cc include/deal.II/dofs/dof_renumbering.h
Simple merge

diff --cc include/deal.II/hp/q_collection.h
Simple merge

diff --cc include/deal.II/lac/solver_qmrs.h
Simple merge

diff --cc include/deal.II/meshworker/output.h
Simple merge

diff --cc include/deal.II/numerics/data_out_dof_data.h
Simple merge

diff --cc source/base/data_out_base.cc
Simple merge

diff --cc source/base/quadrature_lib.cc
Simple merge

diff --cc source/dofs/dof_renumbering.cc
Simple merge

diff --cc source/lac/scalapack.cc
Simple merge

diff --cc tests/base/utilities_pack_unpack_03.cc
Simple merge