Updating version for 1.3.0 release.

Author: lordofhyphens

xs/src/libslic3r/libslic3r.h

@@ -36,7 +36,7 @@ void confess_at(const char *file, int line, const char *func, const char *pat, .
 #define __TRANS(s) s
 namespace Slic3r {
 
-constexpr auto SLIC3R_VERSION = "1.3.0-dev";
+constexpr auto SLIC3R_VERSION = "1.3.0";
 
 typedef long coord_t;
 typedef double coordf_t;