Implement D&D Character Exercise (#676)

* update darts tests to match canonical.json

* change to single quotes

* remove old test case

* implement dnd character exercise

* update config and run make test

* cleanup following code review

* correct import line

* actually correct import line

Author: Tyresius92

config.json

@@ -1328,6 +1328,17 @@
         "math"
       ]
     },
+    {
+      "slug": "dnd-character",
+      "uuid": "b373e13c-f179-4b36-b6e8-2a0f41540344",
+      "core": false,
+      "unlocked_by": null,
+      "difficulty": 2,
+      "topics": [
+        "classes", 
+        "randomness"
+      ]
+    },
     {
       "slug": "trinary",
       "uuid": "1acf1d2d-a25e-4576-94de-0470abc872d9",

exercises/accumulate/package.json

@@ -31,4 +31,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/acronym/package.json

@@ -31,4 +31,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/all-your-base/package.json

@@ -31,4 +31,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/allergies/package.json

@@ -31,4 +31,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/alphametics/package.json

@@ -31,4 +31,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/anagram/package.json

@@ -31,4 +31,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/armstrong-numbers/package.json

@@ -31,4 +31,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/atbash-cipher/package.json

@@ -31,4 +31,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/beer-song/package.json

@@ -31,4 +31,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}