v1.3.0

ocaml-ffmpeg (1.3.0)

• Add support for color_space, color_range, color_primaries,
  color_trc and chroma_location.
• Add support for array of values as filter parameters.
• Add tell to Av.
• Add Av.set_input_metadata
• Add [on_unhandled_packet] to Av.read_input.
• Cleaned up support for subtitles.
• Add Av.get_container_stream_time_base
• Add Av.get_input_format
• Catch AV_NOPTS_VALUE in get_duration and return None
• Cleaned up PackedBa data type in Swscale.