Change name from Configuration to Context

cJSON.c

cJSON.h

tests/CMakeLists.txt

tests/common.h

tests/configuration_tests.c

tests/context_tests.c

tests/misc_tests.c

tests/parse_array.c

tests/parse_number.c

tests/parse_object.c

tests/parse_string.c

tests/parse_value.c

tests/print_array.c

tests/print_number.c

tests/print_object.c

tests/print_string.c

tests/print_value.c