[fix] set default spoofPacket to 5m TTL

[titanism]

Right now the TTL for spoofPacket is only 30s which is too short, e.g. for testing

It should instead be 5m or more

nodejs-dns-over-https-tangerine/index.js

Line 1480 in 27a495c

spoofPacket(name, rrtype, answers = [], json = false, expires = 30000) {