insert overload broken

[albi-k]

The following insert overload appears to be broken in hopscotch_hash:
std::pair<iterator, bool> insert(P&& value)

It seems the issue was the removal of the explicit conversion to value_type from this pull:
#63

Adding it back fixes the issue:
return insert_impl(value_type(std::forward<P>(value)));

Minimal code example to reproduce compilation failure. The same would compile with std::unordered_map.

#include <tsl/hopscotch_map.h>
#include <memory>

class Base {};
class Derived
: public Base {};

int main()
{
    tsl::hopscotch_map<int, std::unique_ptr<Base>> m;
    m.insert( std::make_pair(0, std::make_unique<Derived>()) );
    return 0;
}