Try to build nlohmann-json only it's depended. (#1505)
Try to build nlohmann-json only it's depended. (#1505)

Signed-off-by: owentou <4a3f86a245b3a1dcdb9e5eb4b64894dd9118c1d8@tencent.com>
open-telemetry/opentelemetry-cpp,open-telemetry/opentelemetry-cpp,open-telemetry/opentelemetry-cpp,open-telemetry/opentelemetry-cpp