Moving third party library from header file

I have the following code snippet:

#include <nats/nats.h>

class MyClass
{
public:
    // some functions here
private:
template<typename T, void (*DestroyFn)(T*)>
decltype(DestroyFn) makeDeleter()
{
    return [](T* ptr)
    {
        DestroyFn(ptr);
    };
}

std::unique_ptr<natsOptions, std::function<void(natsOptions*)>> m_options{
    nullptr,
    makeDeleter<natsOptions, natsOptions_Destroy>()};
std::unique_ptr<natsConnection, std::function<void(natsConnection*)>> m_connection{
    nullptr,
    makeDeleter<natsConnection, natsConnection_Destroy>()};
std::unique_ptr<natsSubscription, std::function<void(natsSubscription*)>> m_subscription{
    nullptr,
    makeDeleter<natsSubscription, natsSubscription_Destroy>()};
};

If I wouldn't have required custom deleters I could easily forward declare used types from NATS library. But is it possible to do same if I have makeDeleter function template deleter which calls actual functions from the library (e.g., natsOptions_Destroy)? The thing is that the reviewers of the code require to not include 3rd party library in the current header file, but on the other hand I don't see the issue in my case, because current header is included only in two .cpp file, hence only two translation units will be recompiled if something changes in the nats.h.