Hish Bouabdallah

@simolus3 I noticed an issue with getting `Erc20` balance in web3 (currently using MetaMask). It seems like `RequestArguments` is not getting passed to Ethereum.request. See screenshot. The code works fine...

this seems to fix the issue. I converted map to a JS object and list to JsArray in dart_wrappers.dart ```dart import 'package:js/js_util.dart' as js; Object _mapToJsObject(Map map) { final object...