Bug Fixes
- Skip null txt record
([`40d09b7`](https://github.com/cbrand/micropython-mdns/commit/40d09b7ad1bb5e785b7c8be3f04ac923043545ca))
Do not try to send a txt record when information for sending it out is missing. Before this if there
was a TXT record request it did raise an Exception instead of just not returning the information.
Chores
- Adjust reference example for better use
([`e7b1087`](https://github.com/cbrand/micropython-mdns/commit/e7b10874a95e1e99006dd2f0a3909fbeb042a1ae))
Use the generate_random_postfix call outside of the responder to let the example generate a
consistent postfix for each request.
- Remove confusing test folder
([`7ab609e`](https://github.com/cbrand/micropython-mdns/commit/7ab609e4be51e0927db5dd2938e0ede3d617cabe))