Dunkin’ Donuts celebrates Valentine’s Day with heart-shaped donuts and two new coffee flavors   Fudge Croissant Donut returns for an additional donut delight CANTON, MA, 2017-Jan-31 — /EPR Retail News/ — With the season for sweethearts upon us, Dunkin’ Donuts is welcoming Valentine’s Day with a perfect pairing of sweet coffee flavors, along with the return of heart-shaped…