use reference on temporarry object

[SmileGobo]

in call method used trick with potentional UB

promise-cpp/include/promise-cpp/promise_inl.hpp

Line 206 in 556dce7

const any &value = task->onResolved_.call(promiseHolder->value_);

promise-cpp/include/promise-cpp/promise_inl.hpp

Line 182 in 556dce7

auto call = [&]() -> any {

promise-cpp/include/promise-cpp/promise_inl.hpp

Line 233 in 556dce7

auto call = [&]() -> any {

promise-cpp/include/promise-cpp/promise_inl.hpp

Line 235 in 556dce7

const any &value = task->onRejected_.call(promiseHolder->value_);

What do you think about it?