test: Fix all failing tests

* Update tests to include missing `token` property to a Tx of Ether or Token

* Update tests to include missing `address` property to a Tx of Ether to fixes `TypeError: Cannot read property 'address' of undefined` error

* Update tests to include missing `options` and `args` properties to the Tx so the second argument passed to `transfer$` in `contractForToken(token.address).transfer$(..., ...)` is not NaN

* Fix error `ReferenceError: regeneratorRuntime is not defined`