Ginger Beer Pulled Pork Tacos

Name: Ginger Beer Pulled Pork Tacos
Ingredients: 2 large yellow onions, sliced; 1 (5 pound) boneless pork butt; 1 (12 ounce) bottle Jamaican ginger beer; 3 tablespoons ketchup; 2 tablespoons apple cider vinegar; 1 tablespoons Worcestershire sauce; 1 tablespoon kosher salt; 1 tablespoon smoked paprika; 2 teaspoons ground pepper; 1 teaspoon cumin; 1 teaspoon chipotle chile powder; 1 teaspoon chili powder; 1 teaspoon garlic powder; 1 teaspoon Dijon mustard; For slaw:; 1 (16 ounce) bag coleslaw mix; 2/3 cup mayonnaise; 3 tablespoons whole milk; 2 tablespoons sugar; 1 teaspoon smoked paprika; 1/2 teaspoon kosher salt; 1/4 teaspoon pepper; 1/4 teaspoon chipotle chile powder; For tacos:; Corn tortillas; 1 bunch cilantro, stems removed; 2 limes, cut into wedges