[librsvg/librsvg-2.46] (13 commits) ...Use RefCell instead of UnsafeCell for FilterCtx::background_surface

[Federico Mena Quintero <federico src gnome org>]

Summary of changes:

  68e4ca4... Use openSUSE Tumbleweed for the first tests and the "make d (*)
  e7631db... Run "make" before "make distcheck" in the CI (*)
  74bd1f6... Don't rebuild before distcheck; try to use the previous sta (*)
  a3e68a8... (#503): Add "dyn SomeTrait" where rust 1.39 warns about it  (*)
  bafddce... Make the tarball stage depend on the build stage's artifact (*)
  3cf1819... Explicitly list the artifacts under _build to avoid storing (*)
  aca5034... Add artifacts for files which autotools litters in the sour (*)
  5e39ce0... Add the .la files to the artifacts (*)
  46eb905... Oops, sync the crate version number for librsvg_crate (*)
  e7f5fdb... Sigh, allow failures in debian_i386 (*)
  0b1884e... Merge branch 'opensuse-ci' (*)
  8053315... Return a SharedImage, not &SharedImage, from FilterContext: (*)
  5adb6bd... Use RefCell instead of UnsafeCell for FilterCtx::background (*)

(*) This commit already existed in another branch; no separate mail sent