Fix: Import cJSON v1.7.19 #5216
                
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URL: https://github.com/DaveGamble/cJSON
Tag: v1.7.19
SHA: c859b25da02955fef659d658b8f324b5cde87be3
Synchronized local copy of cJSON with upstream patches.
Apply patches from cJSON to address the following CVEs:
This PR is to address some of the issues raised in #4952