by Claudine Zap Ah, Valentine's Day . Best celebrated elementary-school style with Sweethearts : the Necco heart-shaped candies with the sweet sayings â€" like "be mine." Or at least, that's how it was, back in 2009. The candy company has decided that the sugary treats needed an upgrade. If you scoop up a bunch of the multi-colored candies this year, your tastebuds are in for a shock: The company, which had not changed its recipe in 145 years,