fix networkOrDefault type and typo

[W3stside]

Fixes broken line using buyToken instead of receiveToken and assigns Network type to networkIdOrDefault inside useWalletConnection

[Velenir]

Also change network type inside WalletInfo

[ghost]

Travis automatic deployment:

• 🎩 Dapp: Testing web app
• 📚 Storybook: Component stories

[anxolin]

is this true @W3stside @Velenir ?

Being network a enum, we assume that this value won't ever be any other network.
Or the logic is setting mainnet if we are in an Unknown network?

export enum Network {
  Mainnet = 1,
  Ropsten = 3,
  Rinkeby = 4,
  Goerli = 5,
  Kovan = 42,
  xDAI = 100,
}