[library-web] Put librsvg as an extra tarball, with minimum version 2.42

[Federico Mena Quintero <federico src gnome org>]

commit e72a4b99b384f3cf521084a2b442409b06da0f2c
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Feb 7 08:35:07 2018 -0600

    Put librsvg as an extra tarball, with minimum version 2.42

 data/overlay.xml.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/overlay.xml.in b/data/overlay.xml.in
index 8ac1de2..f6d8db5 100644
--- a/data/overlay.xml.in
+++ b/data/overlay.xml.in
@@ -404,7 +404,7 @@
         <keyword>upcoming-deprecation</keyword>
       </keywords>
     </document>
-    <document doc_module="rsvg" channel="devel">
+    <document doc_module="rsvg" channel="devel" minimum-version="2.42.2">
       <category>api-base</category>
       <subsection>api-utilities</subsection>
       <_abstract>