Error: wallet create options incomplete

The data in the box here: http://bcoin.io/api-docs/index.html?javascript#wallet-options
is incomplete. You can see that it does not include `passphrase`, which is included in the create wallet example:

```javascript
let id, passphrase, witness, accountKey;
id='foo'
passphrase='bar'
witness='false'
accountKey='tpubDDh2XgSds1vBbeVgye88gsGQeCityoywRndtyrXcmvWqCgsFUyUKwzeDv8HiJhu9fC8jRAFMqxr4jj8eRTNTycmMao5wmsAScVf4jSMdPYZ'
const client = new bcoin.http.Client();
const options = {
id: id,
passphrase: passphrase,
witness: witness,
watchOnly: true,
accountKey: accountKey
};

(async() => {
const newWallet = await client.createWallet(options)
})();
```

Because of the link to see all of the options leading up the the box that is incomplete, a user may miss out on the fact that a passphrase can be sent along

Open the wallet API documentation at the linked wallet-options section and compare its create-wallet options box with the JavaScript create wallet example in the issue. Update the options listing so passphrase is included, then verify that the documented options match the example.

Written by the indexing model from the issue text.