Update version to 0.8.3

lsqpack.h

@@ -47,7 +47,7 @@ typedef SSIZE_T ssize_t;
  */
 #define LSQPACK_MAJOR_VERSION 0
 #define LSQPACK_MINOR_VERSION 8
-#define LSQPACK_PATCH_VERSION 2
+#define LSQPACK_PATCH_VERSION 3
 
 /** Let's start with four billion for now */
 typedef unsigned lsqpack_abs_id_t;