LUD-16: Lightning Address

[chill117]

Add support for LUD-16 Lightning Address

Possible new server options:

{
    lightningAddress: {
        // Whether or not to accept payments to any user.
        // Setting this to FALSE will reject payments if a user was not found.
        catchAll: true,
        // Optionally define an array of users for which to accept payments.
        // "username" must be unique.
        users: [
            // { username: 'example' },
            // { username: 'another-user' },
        ],
    },
}

[danielcharrua]

this issue is under development or something? Thx