1.3.4

• Refactored DynamicTonemap to properly do dynamic tone mapping with vs-placebo, as well as unifying how the brightness is measured.
  • show and predetermined_targets were removed.
    To show the brightness, use add_hdr_measurement_props and text.FrameProps on another clip prior to tone mapping.
• Migrated build system to pyproject.toml. Should be backwards compatible to previous setuptools setup.py.