v1.2.0

Changes

• 📝: add tcp flow diagram @mguentner (#66)
• Write a PID file in daemon mode @mguentner (#62)
• cleanup @mguentner (#60)
• include bits/stdc++.h only when using libstdc++ @kraj (#56)
• cmake: build and link static variant of cannelloni-common @mguentner (#54)
• fix: stop application once a thread terminates @mguentner (#52)
• feat: add daemon mode @mguentner (#51)
• Allow MTU to be set @mguentner (#50)
• feat: add ipv6 support @mguentner (#46)
• replace inet_pton with more robust parsing that also supports DNS @mguentner (#45)
• reduce C++ standard to C++11 (#71)

This will probably the last release with major version 1. As #71 showed, it makes sense to increase the major
version once in a while to allow bigger changes and updates. No protocol changes are planned at the moment for the
next major version.