Windows build is broken

[Lihis]

The build has been broken since Bincrafters required manual action (see #50).

The manual action required by Bincrafters infrastructure changes is handled but newer version of packages still require some changes to the code and CMakeLists.txt's so the build succeeds.

At the moment the builds fails to:

CMake Error at plugin/CMakeLists.txt:4 (find_package):
[417](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L417)  Could not find a package configuration file provided by "jsoncpp" with any
[418](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L418)  of the following names:
[419](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L419)
[420](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L420)    jsoncppConfig.cmake
[421](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L421)    jsoncpp-config.cmake
[422](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L422)
[423](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L423)  Add the installation prefix of "jsoncpp" to CMAKE_PREFIX_PATH or set
[424](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L424)  "jsoncpp_DIR" to a directory containing one of the above files.  If
[425](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L425)  "jsoncpp" provides a separate development package or SDK, be sure it has
[426](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L426)  been installed.
[427](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L427)
[428](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L428)
[429](https://ci.appveyor.com/project/Lihis/ets2-job-logger#L429)

See also other issues in the Windows project.