v0.36

What's New:

• Build targets for .Net Framework 4.8.1 and .Net Standard 2.0
• Unit Test Improvements

Bug Fixes:

• Properly support Linux and OSX in all .Net versions (original Makaretu.Dns.Multicast remains broken on those platforms)
• Don't attempt to use interfaces that do not support multicast

Full Changelog: 0.35...v0.36