Problem: 4.3.0 is released, need to update ABI/version

Solution: bump to 5.2.1 and 4.3.1 respectively

CMakeLists.txt

@@ -1074,7 +1074,7 @@ else()
     set_target_properties(libzmq PROPERTIES
       COMPILE_DEFINITIONS "DLL_EXPORT"
       PUBLIC_HEADER "${public_headers}"
-      VERSION "5.2.0"
+      VERSION "5.2.1"
       SOVERSION "5"
       OUTPUT_NAME "zmq"
       PREFIX "lib")

NEWS

+0MQ version 4.3.1 stable, released on 20xx/xx/xx
+================================================
+
+
 0MQ version 4.3.0 stable, released on 2018/11/28
 ================================================
 

configure.ac

@@ -43,10 +43,11 @@ AC_SUBST(PACKAGE_VERSION)
 # ZeroMQ version 4.2.3: 6:3:1 (ABI version 5)
 # ZeroMQ version 4.2.4: 6:4:1 (ABI version 5)
 # ZeroMQ version 4.2.5: 6:5:1 (ABI version 5)
-# ZeroMQ version 4.3.0: 6:6:1 (ABI version 5)
+# ZeroMQ version 4.3.0: 7:0:2 (ABI version 5)
+# ZeroMQ version 4.3.1: 7:1:2 (ABI version 5)
 #
 # libzmq -version-info current:revision:age
-LTVER="7:0:2"
+LTVER="7:1:2"
 AC_SUBST(LTVER)
 
 # Take a copy of original flags

include/zmq.h

@@ -41,7 +41,7 @@
 /*  Version macros for compile-time API version detection                     */
 #define ZMQ_VERSION_MAJOR 4
 #define ZMQ_VERSION_MINOR 3
-#define ZMQ_VERSION_PATCH 0
+#define ZMQ_VERSION_PATCH 1
 
 #define ZMQ_MAKE_VERSION(major, minor, patch)                                  \
     ((major) *10000 + (minor) *100 + (patch))