Add to_dict methods #2044

Job	Run time
py_build_test (ubuntu-latest, 3.7)	2m 0s
cpp_build (ubuntu-latest)	1m 29s
py_build_test (ubuntu-latest, 3.8)	1m 46s
cpp_build (windows-latest)	2m 24s
py_build_test (ubuntu-latest, 3.9)	1m 56s
cpp_build (macos-latest)	4m 44s
py_build_test (ubuntu-latest, 3.10)	1m 50s
py_build_test (ubuntu-latest, 3.11)	1m 49s
py_build_test (ubuntu-latest, 3.12)	1m 55s
py_build_test (windows-latest, 3.7)	1m 49s
py_build_test (windows-latest, 3.8)	1m 50s
py_build_test (windows-latest, 3.9)	1m 48s
py_build_test (windows-latest, 3.10)	1m 56s
py_build_test (windows-latest, 3.11)	1m 52s
py_build_test (windows-latest, 3.12)	1m 49s
py_build_test (macos-latest, 3.7)	2m 7s
py_build_test (macos-latest, 3.8)	2m 2s
py_build_test (macos-latest, 3.9)	2m 3s
py_build_test (macos-latest, 3.10)	2m 1s
py_build_test (macos-latest, 3.11)	2m 2s
py_build_test (macos-latest, 3.12)	2m 4s
py_build_test (windows-latest, mingw64, msys2)	1m 53s
package_sdist	0s
package_wheels	0s
	45m 9s

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