Merge pull request #2981 from heplesser/format17 #100

Job	Run time
cppcheck	3m 28s
clang-format	12s
copyright_headers	11s
black	19s
flake8	28s
forbidden_types	8s
isort	15s
lychee_IGNORED	16s
mypy	27s
pydocstyle	15s
pylint	28s
rstcheck	17s
unused_names	19s
vale	25s
sphinx-rtd	3m 9s
sphinx-conda	0s
build_linux (ubuntu-20.04, gcc, boost, optimize, warning)	11m 49s
build_macos (macos-latest, clang, openmp, mpi, python, gsl, ltdl, boost, hdf5, optimize, warning)	23m 39s
build_linux (ubuntu-20.04, gcc, openmp, python, gsl, ltdl, boost, optimize, warning)	15m 15s
build_linux (ubuntu-20.04, gcc, mpi, python, gsl, ltdl, boost, optimize, warning)	16m 48s
build_linux (ubuntu-20.04, gcc, openmp, mpi, python, gsl, ltdl, boost, hdf5, sionlib, libneurosim...	22m 5s
	1h 40m 13s

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