Function is_array

Source/external/json.hpp:20529–20532

@brief return whether value is an array @sa https://json.nlohmann.me/api/basic_json/is_array/

	/// @brief return whether value is an array
	/// @sa https://json.nlohmann.me/api/basic_json/is_array/
	constexpr bool is_array() const noexcept
	{
		return m_type == value_t::array;
	}

	/// @brief return whether value is a string
	/// @sa https://json.nlohmann.me/api/basic_json/is_string/