package/cppzmq: bump to version 4.8.1

https://github.com/zeromq/cppzmq/releases/tag/v4.8.1
https://github.com/zeromq/cppzmq/releases/tag/v4.8.0

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/cppzmq/cppzmq.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  9853e0437d834cbed5d3c223bf1d755cadee70e7c964c6e42c4c6783dee5d02c  cppzmq-4.7.1.tar.gz
+sha256  7a23639a45f3a0049e11a188e29aaedd10b2f4845f0000cf3e22d6774ebde0af  cppzmq-4.8.1.tar.gz
 sha256  7e6db90e2e805c72b3daa77849d1cb5f1f92da0e69750c8a4aa1d86d70704748  LICENSE

package/cppzmq/cppzmq.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-CPPZMQ_VERSION = 4.7.1
+CPPZMQ_VERSION = 4.8.1
 CPPZMQ_SITE = $(call github,zeromq,cppzmq,v$(CPPZMQ_VERSION))
 CPPZMQ_INSTALL_STAGING = YES
 CPPZMQ_DEPENDENCIES = host-pkgconf zeromq