add readthedocs.yaml #51

Job	Run time
Python: 3.7-x64 on ubuntu-latest	30s
Validate coverage	30s
Build the documentation	20s
Python: 3.7-x64 on windows-2022	52s
Python: 3.7-x86 on windows-2022	1m 7s
Lint the package	24s
Python: 3.7-x64 on macos-12	45s
Python: 3.8-x64 on ubuntu-latest	26s
Python: 3.8-x64 on windows-2022	1m 8s
Python: 3.8-x86 on windows-2022	57s
Python: 3.8-x64 on macos-12	34s
Python: 3.9-x64 on ubuntu-latest	30s
Python: 3.9-x64 on windows-2022	53s
Python: 3.9-x86 on windows-2022	1m 0s
Python: 3.9-x64 on macos-12	36s
Python: 3.10-x64 on ubuntu-latest	29s
Python: 3.10-x64 on windows-2022	52s
Python: 3.10-x86 on windows-2022	1m 10s
Python: 3.10-x64 on macos-12	41s
Python: 3.11-x64 on ubuntu-latest	25s
Python: 3.11-x64 on windows-2022	1m 2s
Python: 3.11-x86 on windows-2022	1m 8s
Python: 3.11-x64 on macos-12	32s
Python: 3.12-x64 on ubuntu-latest	33s
Python: 3.12-x64 on windows-2022	47s
Python: 3.12-x86 on windows-2022	1m 14s
Python: 3.12-x64 on macos-12	56s
Python: pypy-3.8-x64 on ubuntu-latest	44s
Python: pypy-3.8-x64 on windows-2022	1m 12s
Python: pypy-3.8-x86 on windows-2022	1m 36s
Python: pypy-3.8-x64 on macos-12	47s
	24m 40s

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