fix page_bin and pages statistics; merge thread-local statistics regularly with main statistics; bump version to 3.0.4

test/test-stress.c

@@ -372,6 +372,7 @@ int main(int argc, char** argv) {
     mi_free(json);
   }
   #endif
+  mi_collect(true);
   mi_stats_print(NULL);
 #endif
   //bench_end_program();