message: Update Arch packages in readme
diff: @@ -31,13 +31,17 @@ use opencv::prelude::*;
  #### Arch Linux:
  -OpenCV package in Arch is suitable for this.
  +OpenCV package in Arch is suitable for this:
  `pacman -S clang qt5-base opencv`
  +and additionally to support more OpenCV modules:
  +
  +`pacman -S vtk glew fmt openmpi`
  +
  #### Ubuntu:
  -`sudo apt install libopencv-dev clang libclang-dev`
  +`apt install libopencv-dev clang libclang-dev`
  #### Other Linux:
  You have several options of getting the OpenCV library:
  