implement civo domain records update

[kallisti5]

Instead of requiring users to "remove and recreate" domain records, it would be nice to implement an "update" action.

Proposed usage:

civo domain record update domain.com -n thing.domain.com -v "0.0.0.0"

Currently you have to pragmatically find the record id to remove the existing record, then recreate it which is... not great...

#!/bin/bash

export DOMAIN="domain.com"
export TARGET="subdomain"

export EV4="$(curl -q -4 ifconfig.me 2>/dev/null)"
export EV6="$(curl -q -6 ifconfig.me 2>/dev/null)"

echo "My external IP is $EV4 / $EV6"

EV4ID=$(civo domain record ls $DOMAIN -o json | jq -r ".[] | select(.name==\"$TARGET\") | .id")
EV4IP=$(civo domain record ls $DOMAIN -o json | jq -r ".[] | select(.name==\"$TARGET\") | .value")

if [[ $EV4IP == $EV4 ]]; then
    echo "No updates needed"
else
    civo domain record remove $DOMAIN $EV4ID -y
    civo domain record create $DOMAIN -n ${TARGET}.${DOMAIN} -e A -v $EV4
fi