Upgrade JSON Toolkit to `e86ad1e3` #320

Job	Run time
docker	1m 1s
test (ubuntu-latest, clang, clang++, sh)	1m 25s
test (ubuntu-latest, gcc, g++, sh)	49s
test (macos-13, clang, clang++, sh)	1m 24s
test (macos-14, clang, clang++, sh)	55s
test (windows-latest, pwsh)	3m 21s
	8m 55s

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