Update to cJSON 1.7.19

[embedded-kiddie]

This pull request is specifically to follow up on cJson 1.7.19, which addresses CVE-related issues.

I've verified that the output of examples have been matched for each of UNO R3, UNO R4 Minima, and ESP32 before and after the update.

[CLAassistant]

All committers have signed the CLA.

[github-actions]

Memory usage change @ abaa1de

Board	flash	%	RAM for global variables	%
arduino:avr:leonardo	🔺 +80 - +144	+0.28 - +0.5	🔺 +2 - +4	+0.08 - +0.16
arduino:avr:mega	🔺 +82 - +142	+0.03 - +0.06	🔺 +2 - +4	+0.02 - +0.05
arduino:avr:nano	🔺 +82 - +142	+0.27 - +0.46	🔺 +2 - +4	+0.1 - +0.2
arduino:avr:yun	🔺 +80 - +144	+0.28 - +0.5	🔺 +2 - +4	+0.08 - +0.16
arduino:mbed_edge:edge_control	🔺 +128 - +192	+0.01 - +0.02	0 - 0	0.0 - 0.0
arduino:mbed_nano:nano33ble	🔺 +128 - +256	+0.01 - +0.03	0 - 0	0.0 - 0.0
arduino:mbed_nano:nanorp2040connect	🔺 +137 - +217	0.0 - 0.0	0 - 0	0.0 - 0.0
arduino:mbed_portenta:envie_m7	N/A	N/A	N/A	N/A
arduino:mbed_portenta:envie_m7:target_core=cm4	N/A	N/A	N/A	N/A
arduino:megaavr:nona4809	🔺 +81 - +143	+0.16 - +0.29	0 - 0	0.0 - 0.0
arduino:megaavr:uno2018	🔺 +81 - +143	+0.17 - +0.29	0 - 0	0.0 - 0.0
arduino:sam:arduino_due_x_dbg	🔺 +128 - +200	+0.02 - +0.04	N/A	N/A
arduino:samd:arduino_zero_edbg	🔺 +144 - +216	+0.05 - +0.08	0 - 0	0.0 - 0.0
arduino:samd:mkrzero	🔺 +136 - +208	+0.05 - +0.08	0 - 0	0.0 - 0.0
arduino:samd:nano_33_iot	🔺 +136 - +208	+0.05 - +0.08	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/JSONArray flash	%	examples/JSONArray RAM for global variables	%	examples/JSONKitchenSink flash	%	examples/JSONKitchenSink RAM for global variables	%	examples/JSONObject flash	%	examples/JSONObject RAM for global variables	%	examples/JSONValueExtractor flash	%	examples/JSONValueExtractor RAM for global variables	%
arduino:avr:leonardo	124	0.43	4	0.16	80	0.28	2	0.08	132	0.46	4	0.16	144	0.5	4	0.16
arduino:avr:mega	124	0.05	2	0.02	82	0.03	4	0.05	132	0.05	2	0.02	142	0.06	2	0.02
arduino:avr:nano	122	0.4	2	0.1	82	0.27	4	0.2	130	0.42	2	0.1	142	0.46	2	0.1
arduino:avr:yun	124	0.43	4	0.16	80	0.28	2	0.08	132	0.46	4	0.16	144	0.5	4	0.16
arduino:mbed_edge:edge_control	128	0.01	0	0.0	128	0.01	0	0.0	192	0.02	0	0.0	128	0.01	0	0.0
arduino:mbed_nano:nano33ble	192	0.02	0	0.0	128	0.01	0	0.0	256	0.03	0	0.0	192	0.02	0	0.0
arduino:mbed_nano:nanorp2040connect	179	0.0	0	0.0	137	0.0	0	0.0	217	0.0	0	0.0	161	0.0	0	0.0
arduino:mbed_portenta:envie_m7	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
arduino:mbed_portenta:envie_m7:target_core=cm4	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
arduino:megaavr:nona4809	135	0.27	0	0.0	81	0.16	0	0.0	143	0.29	0	0.0	143	0.29	0	0.0
arduino:megaavr:uno2018	135	0.28	0	0.0	81	0.17	0	0.0	143	0.29	0	0.0	143	0.29	0	0.0
arduino:sam:arduino_due_x_dbg	176	0.03	N/A	N/A	128	0.02	N/A	N/A	200	0.04	N/A	N/A	152	0.03	N/A	N/A
arduino:samd:arduino_zero_edbg	176	0.07	0	0.0	144	0.05	0	0.0	216	0.08	0	0.0	160	0.06	0	0.0
arduino:samd:mkrzero	184	0.07	0	0.0	136	0.05	0	0.0	208	0.08	0	0.0	160	0.06	0	0.0
arduino:samd:nano_33_iot	184	0.07	0	0.0	136	0.05	0	0.0	208	0.08	0	0.0	160	0.06	0	0.0

Click for full report CSV

Board,examples/JSONArray<br>flash,%,examples/JSONArray<br>RAM for global variables,%,examples/JSONKitchenSink<br>flash,%,examples/JSONKitchenSink<br>RAM for global variables,%,examples/JSONObject<br>flash,%,examples/JSONObject<br>RAM for global variables,%,examples/JSONValueExtractor<br>flash,%,examples/JSONValueExtractor<br>RAM for global variables,%
arduino:avr:leonardo,124,0.43,4,0.16,80,0.28,2,0.08,132,0.46,4,0.16,144,0.5,4,0.16
arduino:avr:mega,124,0.05,2,0.02,82,0.03,4,0.05,132,0.05,2,0.02,142,0.06,2,0.02
arduino:avr:nano,122,0.4,2,0.1,82,0.27,4,0.2,130,0.42,2,0.1,142,0.46,2,0.1
arduino:avr:yun,124,0.43,4,0.16,80,0.28,2,0.08,132,0.46,4,0.16,144,0.5,4,0.16
arduino:mbed_edge:edge_control,128,0.01,0,0.0,128,0.01,0,0.0,192,0.02,0,0.0,128,0.01,0,0.0
arduino:mbed_nano:nano33ble,192,0.02,0,0.0,128,0.01,0,0.0,256,0.03,0,0.0,192,0.02,0,0.0
arduino:mbed_nano:nanorp2040connect,179,0.0,0,0.0,137,0.0,0,0.0,217,0.0,0,0.0,161,0.0,0,0.0
arduino:mbed_portenta:envie_m7,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A
arduino:mbed_portenta:envie_m7:target_core=cm4,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A
arduino:megaavr:nona4809,135,0.27,0,0.0,81,0.16,0,0.0,143,0.29,0,0.0,143,0.29,0,0.0
arduino:megaavr:uno2018,135,0.28,0,0.0,81,0.17,0,0.0,143,0.29,0,0.0,143,0.29,0,0.0
arduino:sam:arduino_due_x_dbg,176,0.03,N/A,N/A,128,0.02,N/A,N/A,200,0.04,N/A,N/A,152,0.03,N/A,N/A
arduino:samd:arduino_zero_edbg,176,0.07,0,0.0,144,0.05,0,0.0,216,0.08,0,0.0,160,0.06,0,0.0
arduino:samd:mkrzero,184,0.07,0,0.0,136,0.05,0,0.0,208,0.08,0,0.0,160,0.06,0,0.0
arduino:samd:nano_33_iot,184,0.07,0,0.0,136,0.05,0,0.0,208,0.08,0,0.0,160,0.06,0,0.0

[facchinm]

LGTM, thanks for the contribution!