[librsvg] Created tag 2.42.7

[Federico Mena Quintero <federico src gnome org>]

The signed tag '2.42.7' was created.

Tagger: Federico Mena Quintero <federico gnome org>
Date: 1534962853 -0500

    Tag for version 2.42.7

Changes since the last tag '2.42.6':

Federico Mena Quintero (8):
      Post-release version bump
      Keep track of how many elements get instanced through <use> nodes
      gitlab#323 - Limit the number of instancings through the <use> element
      rsvg-convert: Exit with an error code if rendering was unsuccessful
      tests/errors.c: New set of tests for reported errors from the API
      rsvg-test.c: Check the return value of rsvg_handle_render_cairo()
      Clarify documentation for rsvg_handle_render_cairo() / render_cairo_sub()
      Update NEWS