Release 0.4.0 (#286)

Signed-off-by: Björn Svensson <bjorn.a.svensson@est.tech>

Author: bjosv

include/valkey/valkey.h

@@ -50,7 +50,7 @@ typedef SSIZE_T ssize_t;
 #include <stdint.h> /* uintXX_t, etc */
 
 #define LIBVALKEY_VERSION_MAJOR 0
-#define LIBVALKEY_VERSION_MINOR 3
+#define LIBVALKEY_VERSION_MINOR 4
 #define LIBVALKEY_VERSION_PATCH 0
 
 /* Connection type can be blocking or non-blocking and is set in the