Merge commit 'b9112977b074d67d6c83f04af36b6dabdf1d92c6' as 'external/json'

external/json/docs/examples/number_integer_t.cpp

@@ -0,0 +1,10 @@
+#include <iostream>
+#include <iomanip>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+int main()
+{
+    std::cout << std::boolalpha << std::is_same<std::int64_t, json::number_integer_t>::value << std::endl;
+}