refactor(test): use builtin meson test

test/vector/vec1.c

@@ -30,7 +30,7 @@ int my_cmp(const void *a, const void *b) {
 	return ma->age - mb->age;
 }
 
-void test_vec1(void) {
+int main(void) {
 	/* Allocate a new vector */
 	size_t elem_size = sizeof(my_elem_s);
 	vec_s *v = vec_new(10, elem_size);