Wanseo Son

Results 2 issues of Wanseo Son

**Version of EOSJS** 22.1.0 **Describe the bug** When I use PrivateKey, I got an error. The error message is "ReferenceError: Can't find variable: Buffer". This error causes because there's no...

this pr fixes [#1106](https://github.com/EOSIO/eosjs/issues/1106)