Make depends parameter optional in heevd.hpp

Author: vlad-perevezentsev

dpnp/backend/extensions/lapack/heevd.hpp

@@ -44,7 +44,7 @@ extern std::pair<sycl::event, sycl::event>
           const std::int8_t upper_lower,
           dpctl::tensor::usm_ndarray eig_vecs,
           dpctl::tensor::usm_ndarray eig_vals,
-          const std::vector<sycl::event> &depends);
+          const std::vector<sycl::event> &depends = {});
 
 extern void init_heevd_dispatch_table(void);
 } // namespace lapack