Bump lodash from 4.17.15 to 4.17.19 in /examples/timestamping/frontend (#1880)
Bump lodash from 4.17.15 to 4.17.19 in /examples/timestamping/frontend (#1880)


exonum/exonum,exonum/exonum,exonum/exonum,exonum/exonum