[librsvg] Created tag 2.52.4

[Federico Mena Quintero <federico src gnome org>]

The signed tag '2.52.4' was created.

Tagger: Federico Mena Quintero <federico gnome org>
Date: 1636774243 -0600

    Tag for version 2.52.4

Changes since the last tag '2.52.3':

Chun-wei Fan (2):
      NMake Makefiles: Support Visual Studio 2022
      NMake Makefiles: Fix running Rust tests

Federico Mena Quintero (25):
      Convert the test for #804 into a reference test
      PositionedSpan::layout - pass the DrawingCtx's transform in the LayoutContext
      create_pango_layout() - Get the writing_mode from the LayoutContext
      create_pango_context() - Take the font options as an argument
      create_pango_context() - Pass the transform as an argument
      create_pango_context() - Turn into a free function
      Pass the DrawingCtx's current transform to the draw_fn callback of with_discrete_layer()
      Use the transform passed to draw_fn instead of asking DrawingCtx::get_transform
      Create an empty bbox using the obviously right transform
      Don't get the ViewParams twice
      Pass the view_params around in the LayoutContext
      text.rs - Use LayoutContext in the last places that used DrawingCtx
      Call cairo_has_current_point() by hand since cairo-rs-sys is buggy
      DrawingCtx.initial_transform_with_offset - remove this function; use the plain initial transform
      Remove unused function
      Define the isolation property
      StackingContext: carry the value of the isolation property here
      Handle the isolation property in the drawing machinery
      No need to handle filterUnits specially anymore
      pattern: Don't panic when trying to resolve with an empty bounding box
      (#818): Allow having a mask and opacity in the same element
      List the isolation property in FEATURES.md
      Update NEWS
      Bump version to 2.52.4
      Add svg2-reftests to tests/Makefile.am

Marge Bot (9):
      Merge branch 'notriddle/use-cstr-for-c-strings' into 'main'
      Merge branch 'notriddle/url-docs' into 'main'
      Merge branch 'text-reftests' into 'main'
      Merge branch 'suse-s390x-cairo' into 'main'
      Merge branch 'transform-cleanup' into 'main'
      Merge branch 'isolation' into 'main'
      Merge branch 'drawing-fixes' into 'main'
      Merge branch 'vs2022-config' into 'main'
      Merge branch 'prepare-release' into 'main'

Michael Howell (2):
      Use CStr for C string conversion instead of `as`
      Change bare URL in doc comments to CommonMark hyperlinks