package/libxml2: bump version to 2.13.4

Release notes:
https://download.gnome.org/sources/libxml2/2.13/libxml2-2.13.4.news

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libxml2/libxml2.hash

@@ -1,4 +1,4 @@
-# From https://download.gnome.org/sources/libxml2/2.13/libxml2-2.13.3.sha256sum
-sha256  0805d7c180cf09caad71666c7a458a74f041561a532902454da5047d83948138  libxml2-2.13.3.tar.xz
+# From https://download.gnome.org/sources/libxml2/2.13/libxml2-2.13.4.sha256sum
+sha256  65d042e1c8010243e617efb02afda20b85c2160acdbfbcb5b26b80cec6515650  libxml2-2.13.4.tar.xz
 # License files, locally calculated
 sha256  c99aae1afe013e50b8b3701e089222b351258043c3025b64053a233fd25b4be7  Copyright

package/libxml2/libxml2.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 LIBXML2_VERSION_MAJOR = 2.13
-LIBXML2_VERSION = $(LIBXML2_VERSION_MAJOR).3
+LIBXML2_VERSION = $(LIBXML2_VERSION_MAJOR).4
 LIBXML2_SOURCE = libxml2-$(LIBXML2_VERSION).tar.xz
 LIBXML2_SITE = \
 	https://download.gnome.org/sources/libxml2/$(LIBXML2_VERSION_MAJOR)