The latest development sources are always at Github. You can fetch the code with the following command:
git clone https://github.com/x64architecture/libicuid.git
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
cmake -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=Release ..
make
make install
mkdir build
cd build
cmake -G"NMake Makefiles" -DCMAKE_BUILD_TYPE=Release ..
cmake -G"NMake Makefiles" -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=Release ..
nmake
Note: You can create Visual Studio Solution files by excluding the -G"NMake Makefiles" from the command and not running nmake