[librsvg] Update minimum cairo version in COMPILING.md

[Federico Mena Quintero <federico src gnome org>]

commit 26edb54fb4cad9dbfd8de5cd6d8e5a2105af4a34
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Oct 23 19:12:33 2018 -0500

    Update minimum cairo version in COMPILING.md

 COMPILING.md | 2 +-
 configure.ac | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/COMPILING.md b/COMPILING.md
index 496fe49c..9b3cfb49 100644
--- a/COMPILING.md
+++ b/COMPILING.md
@@ -36,7 +36,7 @@ minimum version is listed here; you may use a newer version instead.
 
 **Mandatory dependencies:**
 
-* Cairo 1.15.4 with PNG support
+* Cairo 1.15.12 with PNG support
 * Freetype2 2.8.0
 * Libcroco 0.6.1
 * Gdk-pixbuf 2.20.0
diff --git a/configure.ac b/configure.ac
index 4ead3b2b..8ee8d655 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,7 +38,6 @@ AC_SUBST([LIBRSVG_MICRO_VERSION],[rsvg_micro_version])
 
 dnl ===========================================================================
 dnl Please update COMPILING.md with version numbers if these change
-
 CAIRO_REQUIRED=1.15.12
 CROCO_REQUIRED=0.6.1
 dnl This corresponds to Freetype2 2.8