update to version 2.1.0
update to version 2.1.0

https://github.com/nlohmann/json/releases/tag/v2.1.0

- Release date: 2017-01-28
- SHA-256: a571dee92515b685784fd527e38405cf3f5e13e96edbfe3f03d6df2e363a767b

FALCONN-LIB/FALCONN,FALCONN-LIB/FALCONN,FALCONN-LIB/FALCONN,FALCONN-LIB/FALCONN