[librsvg] Update NEWS for 2.42.0

[Federico Mena Quintero <federico src gnome org>]

commit a341604fe3fe599a5f559089d7d2148bf88d3d1f
Author: Federico Mena Quintero <federico gnome org>
Date:   Mon Jan 8 17:54:40 2018 -0600

    Update NEWS for 2.42.0

 NEWS | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/NEWS b/NEWS
index 7956646..d47d063 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,12 @@
+Version 2.42.0
+- Fix a memory leak in rsvg_handle_new_from_file() (Lovell Fuller).
+- Optimize the xml:space normalization function (Jordan Petridis).
+- gitlab#179 - fix a runtime warning in the feMergeNode code.
+- gitlab#175 - Clarify documentation about the rsvg_*_sub() APIs.
+- Stylistic fixes from cargo-clippy (Jordan Petridis).
+- Port the Pango glue code to Rust.
+- New ARCHITECTURE.md with a description of librsvg's internals.
+
 Version 2.41.2
 - We now require glib 2.52.0.
 - bgo#787895 - Fix mis-use of libxml2.  Thanks to Nick Wellnhofer for