Wow item updater script

[Alex Cohen]

#371 (comment)

@spatiag can you also make an updater script like this one that makes the file easy to update:

https://github.com/ff14-advanced-market-search/saddlebag-with-pockets/blob/master/scripts/write-ffxiv-items.js

We can pull all the data we need from something like this:

curl -s -X POST \
    http://api.saddlebagexchange.com/api/wow/itemnames \
    -H 'Accept: application/json' \
    -H 'Content-Type: application/json' \
    -d '{}' | jq .