Make List constructor with capacity reserve the space, instead of creating the vector with a set size.

src/Collections/List.hpp

@@ -16,7 +16,7 @@ namespace Arbutils::Collections {
 
     public:
         List() : _vector() {}
-        explicit List(size_t capacity) : _vector(capacity) {}
+        explicit List(size_t capacity) : _vector(0) { _vector.reserve(capacity); }
         List(const std::initializer_list<ValueT>& l) : _vector(l) {}
         List(const ValueT* begin, const ValueT* end) : _vector(begin, end) {}