[librsvg] Created tag 2.42.6

[Federico Mena Quintero <federico src gnome org>]

The signed tag '2.42.6' was created.

Tagger: Federico Mena Quintero <federico gnome org>
Date: 1533678149 -0500

    Tag for version 2.42.6

Changes since the last tag '2.42.5':

Fabrice Fontaine (1):
      Add RUST_TARGET variable

Federico Mena Quintero (12):
      Remind people that github will delete their pull requests
      Punctuation fix.
      COMPILING.md: Update to mention the RUST_TARGET environment variable
      configure.ac: Post-release version bump
      (#282) - Don't reuse the input surface for painting feComposite's output
      (#241) rsvg_new_node_light_source() - Fix cut&paste error between feDistantLight and feSpotLight
      Add test for the light source type
      (#259): Make test fonts work for installed tests
      CONTRIBUTING.md: Note on formatting commit messages
      (#292): Don't panic if we try to clip with an empty bounding box
      Update NEWS
      Update rustfmt configuration

Ivan Molodetskikh (1):
      Fix find_light_source_in_children()

Jehan (2):
      Makefile: fix VPATH (out-of-tree) builds.
      tests: fix also VPATH build for unit tests.