[api] Default options accessible through getters, not static structs

src/bench.c

@@ -38,7 +38,7 @@ int main(int argc, char **argv) {
         exit(EXIT_FAILURE);
     }
 
-    normalize_options_t options = LIBPOSTAL_DEFAULT_OPTIONS;
+    normalize_options_t options = get_libpostal_default_options();
 
     options.num_languages = 1;
     options.languages = languages;