* bigint upgraded to version 3.0 * fixed missing FromHex import in ethcore tests * fixed missing FromHex import in rpc tests
* update to latest bigint * bump elastic array and deps * fix rlp tests * also update all smallvec deps * fix doc test * reduce parking in attempt to fix CI bug * fix from/into electum bug * remove duplicate imports
* Ledger devices support * structs for RPC types