Update dependencies and bigint api (#5685)

* 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

updater/src/operations.rs

@@ -4,7 +4,7 @@ use std::string::String;
 use std::result::Result;
 use std::fmt;
 use ethabi;
-use util::{self, Uint};
+use util;
 
 pub struct Operations {
 	contract: ethabi::Contract,