docs: conform docstrings to PEP257 #42

Job	Run time
Validate coverage	35s
Lint the package	17s
Build the documentation	22s
Python: 3.7-x64 on ubuntu-latest	23s
Python: 3.7-x64 on windows-latest	7s
Python: 3.7-x86 on windows-latest	5s
Python: 3.7-x64 on macos-13	1s
Python: 3.7-x86 on macos-13	1s
Python: 3.8-x64 on ubuntu-latest	1s
Python: 3.8-x64 on windows-latest	1s
Python: 3.8-x86 on windows-latest	1s
Python: 3.8-x64 on macos-13	1s
Python: 3.8-x86 on macos-13	1s
Python: 3.9-x64 on ubuntu-latest	1s
Python: 3.9-x64 on windows-latest	1s
Python: 3.9-x86 on windows-latest	1s
Python: 3.9-x64 on macos-13	1s
Python: 3.9-x86 on macos-13	1s
Python: 3.10-x64 on ubuntu-latest	19s
Python: 3.10-x64 on windows-latest	7s
Python: 3.10-x86 on windows-latest	9s
Python: 3.10-x64 on macos-13	23s
Python: 3.10-x86 on macos-13	6s
Python: 3.11-x64 on ubuntu-latest	22s
Python: 3.11-x64 on windows-latest	16s
Python: 3.11-x86 on windows-latest	9s
Python: 3.11-x64 on macos-13	24s
Python: 3.11-x86 on macos-13	7s
Python: 3.12-x64 on ubuntu-latest	9s
Python: 3.12-x64 on windows-latest	3s
Python: 3.12-x86 on windows-latest	8s
Python: 3.12-x64 on macos-13	23s
Python: 3.12-x86 on macos-13	1s
Python: pypy-3.8-x64 on ubuntu-latest	1s
Python: pypy-3.8-x64 on windows-latest	1s
Python: pypy-3.8-x86 on windows-latest	1s
Python: pypy-3.8-x64 on macos-13	1s
Python: pypy-3.8-x86 on macos-13	1s
	5m 12s

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