add jairee_match_free()

test/test_jairee.c

@@ -43,6 +43,7 @@ static void test_basic_re()
     TEST(match->start == 0u);
     TEST(match->end == 4u);
     TEST(match->next == NULL);
+    jairee_match_free(match);
     jairee_string_free(s);
 }