Deprecation of std::allocator::construct

[Deleted user]

Since function std::allocator::construct is deprecated in c++17 and removed in C++20, i suggest to change the line 107 of earcut.hpp from:
alloc.construct(object, std::forward(args)...);
to:
new (static_cast<void*>(object)) T(std::forward(args)...);

[mrgreywater]

Thanks for giving notice. Resolved using std::allocator_traits in 71f0ca9