doc: mention libicu-dev as a new dependency

README.md

@@ -69,13 +69,13 @@ Project is using cmake (>=2.8.8) build system.
            libssl-dev libglib2.0-dev libpango1.0-dev libgl1-mesa-dev     \
            libevent-dev libgtk2.0-dev libxrandr-dev libxrender-dev       \
            libxcursor-dev libv4l-dev libgles2-mesa-dev libavcodec-dev    \
-           libva-dev libvdpau-dev libdrm-dev
+           libva-dev libvdpau-dev libdrm-dev libicu-dev
     Fedora:
     $ sudo dnf install cmake gcc gcc-c++ pkgconfig ragel alsa-lib-devel openssl-devel \
            glib2-devel pango-devel mesa-libGL-devel libevent-devel gtk2-devel         \
            libXrandr-devel libXrender-devel libXcursor-devel libv4l-devel             \
            mesa-libGLES-devel  ffmpeg-devel libva-devel libvdpau-devel libdrm-devel   \
-           pulseaudio-libs-devel
+           pulseaudio-libs-devel libicu-devel
 
 ```
 * (optional) To enable PulseAudio support, install `libpulse-dev`.