Code review comment for lp:~widelands-dev/widelands/net-boost-asio

> I found Asio 1.10.6 / Boost 1.58 as part of the boost library
> provided by MacPorts (https://www.macports.org/)
>
> most recent is Asio 1.10.9 / Boost 1.64

From CMakelists.txt:

find_package(Boost 1.48
  COMPONENTS
    unit_test_framework
    regex
  REQUIRED
    system)

So, we require version 1.48 as our lowest boost version. If we need a
higher version for the ASIO stuff, we will need to change that line.

The lowest Ubuntu version that we support is Trusty (14.04), which
already comes with Boost version 1.54. Travis is also on Boost 1.54

AppVeyor is pulling Boost version 1.63.

We should go over
http://www.boost.org/doc/libs/1_64_0/doc/html/boost_asio/history.html to
see if we need to require a higher Boost version.