Add sets seed data (boss-to-set references)

data/sets.json

@@ -0,0 +1,87 @@
+[
+  {
+    "setNumber": "70418",
+    "setName": "J.B.'s Ghost Lab",
+    "boss": "Dr. Drewell"
+  },
+  {
+    "setNumber": "70419",
+    "setName": "Wrecked Shrimp Boat",
+    "boss": "Captain Archibald"
+  },
+  {
+    "setNumber": "70420",
+    "setName": "Graveyard Mystery",
+    "boss": "Mamali"
+  },
+  {
+    "setNumber": "70421",
+    "setName": "El Fuego's Stunt Truck",
+    "boss": "Samuel Mason"
+  },
+  {
+    "setNumber": "70422",
+    "setName": "Shrimp Shack Attack",
+    "boss": "Anomolo"
+  },
+  {
+    "setNumber": "70423",
+    "setName": "Paranormal Intercept Bus 3000",
+    "boss": "Spewer"
+  },
+  {
+    "setNumber": "70424",
+    "setName": "Ghost Train Express",
+    "boss": "The Bawa"
+  },
+  {
+    "setNumber": "70425",
+    "setName": "Newbury Haunted High School",
+    "boss": "Mr. Nibs"
+  },
+  {
+    "setNumber": "70427",
+    "setName": "Welcome to the Hidden Side",
+    "boss": "Lady E"
+  },
+  {
+    "setNumber": "70428",
+    "setName": "Jack's Beach Buggy",
+    "boss": "Trucker Dale"
+  },
+  {
+    "setNumber": "70429",
+    "setName": "El Fuego's Stunt Plane",
+    "boss": "Harry Cane"
+  },
+  {
+    "setNumber": "70431",
+    "setName": "The Lighthouse of Darkness",
+    "boss": "Joe Ishmael"
+  },
+  {
+    "setNumber": "70432",
+    "setName": "Haunted Fairground",
+    "boss": "Tragico"
+  },
+  {
+    "setNumber": "70434",
+    "setName": "Supernatural Race Car",
+    "boss": "Maxine Turbo"
+  },
+  {
+    "setNumber": "70435",
+    "setName": "Newbury Abandoned Prison",
+    "boss": "Bart Chaney"
+  },
+  {
+    "setNumber": "70436",
+    "setName": "Phantom Fire Truck 3000",
+    "boss": "Blaze M. Barr"
+  },
+  {
+    "setNumber": "70437",
+    "setName": "Mystery Castle",
+    "boss": "The Maw"
+  }
+]