Zeroconf

- Performance improvements for constructing outgoing packet data
(\1090) bdraco

Technically backwards incompatible:

- Switch to using async\_timeout for timeouts (\1081) bdraco

Significantly reduces the number of asyncio tasks that are created
when using <span class="title-ref">ServiceInfo</span> or
<span class="title-ref">AsyncServiceInfo</span>

- Performance improvements for parsing incoming packet data (\1076)
bdraco

- Performance improvements for fetching ServiceInfo (\1068) bdraco

- Fix ServiceBrowsers not getting ServiceStateChange.Removed callbacks
on PTR record expire (\1064) bdraco

ServiceBrowsers were only getting a
<span class="title-ref">ServiceStateChange.Removed</span> callback
when the record was sent with a TTL of 0. ServiceBrowsers now
correctly get a
<span class="title-ref">ServiceStateChange.Removed</span> callback
when the record expires as well.

- Fix missing minimum version of python 3.7 (\1060) stevencrader

- Fix IP Address updates when hostname is uppercase (\1057) bdraco

ServiceBrowsers would not callback updates when the ip address
changed if the hostname contained uppercase characters