Update Thread and add install targets

[MalcolmMielle]

Added missing dep to THREAD and install targets to be able to invoke the project with

ExternalProject_Add(

    asyncsocketscpp
    GIT_REPOSITORY "https://github.com/eminfedar/async-sockets-cpp.git"
    GIT_TAG "master"

    UPDATE_COMMAND ""
    PATCH_COMMAND ""

    SOURCE_DIR "${CMAKE_SOURCE_DIR}/3rdparty/asyncsocketscpp"
    CMAKE_ARGS -DBuildShared=ON -DBuildExamples=OFF -DCMAKE_INSTALL_PREFIX=${GLOBAL_OUTPUT_PATH}/asyncsocketscpp

    TEST_COMMAND ""
)

or

FetchContent_Declare(

    asyncsocketscpp
    GIT_REPOSITORY "https://github.com/MalcolmMielle/async-sockets-cpp.git"
    GIT_TAG "install_cmake"
)
FetchContent_MakeAvailable(asyncsocketscpp)