monero-javascript-v0.4.0

• Update to v0.16.0.1 'Nitrogen Nebula'
• Support onBalancesChanged() wallet listener
• Standardize module imports and use of require()

New API to import library and main types (breaking change):

const monerojs = require("monero-javascript");
let daemon = monerojs.connectToDaemonRpc("http://localhost:38081", "superuser", "abctesting123");
let walletRpc = monerojs.connectToWalletRpc("http://localhost:38083", "rpc_user", "abc123");
let walletKeys = await monerojs.openWalletKeys({...})
let walletWasm1 = await monerojs.createWalletWasm({...})
let walletWasm2 = await monerojs.openWalletWasm({...})