• filamat: completely remove the DIR variant bit [⚠️ New Material Version]
• matc: the directionalLighting variant filter is deprecated and ignored; it will be removed in
  a future release
• matc: remove the deprecated dynamicLighting variant filter
• engine: Texture::setImage(), Texture::setImageAsync() and Texture::generateMipmaps() are
  now non-const; the const overloads are deprecated
• engine: Material::getDefaultInstance() const is deprecated; use the non-const overload
• engine: FrameHistoryStream::getNewFrames() now consumes the new frames when it returns, rather
  than as the range is iterated: frames that aren't iterated are no longer returned by the next
  call, and a range can be iterated more than once. Missing frame IDs just before a PENDING frame
  are now returned with that frame [⚠️ API Change]
• engine: Engine::Builder::build() now also validates the Engine::Config when the engine is
  created asynchronously
• engine: fix the const DebugRegistry::getPropertyAddress() templates, which didn't compile
• engine: fix a dangling reference to the caller's string in DebugRegistry::getDataSource()
• libs: the IBLPrefilterContext filters (EquirectangularToCubemap, IrradianceFilter and
  SpecularFilter) now take a non-const input Texture*; the overloads taking a
  Texture const* are deprecated
• engine: TransformManager now incrementally reorders its components during
  Renderer::endFrame() / Renderer::skipFrame(). TransformManager::Instance values must not
  be kept across frames (or across create(), destroy(), setParent()); keep the Entity and
  call getInstance() again instead. [⚠️ API Change]
• engine: children orphaned by TransformManager::destroy() now have their world transform
  updated to their local transform, as documented.