Upgrade JSON Toolkit to `3ef19daf7ca042544239111c701a51232f3f5576` #323

Job	Run time
docker	1m 33s
test (ubuntu-latest, clang, clang++, sh)	1m 32s
test (ubuntu-latest, gcc, g++, sh)	1m 7s
test (macos-13, clang, clang++, sh)	2m 36s
test (macos-14, clang, clang++, sh)	58s
test (windows-latest, pwsh)	4m 5s
	11m 51s

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