Upgrade mocha to 1.21.5

Author: artemp

package.json

@@ -12,7 +12,7 @@
   },
   "devDependencies": {
     "glob": "4.x",
-    "mocha": "1.x"
+    "mocha": "^1.21.5"
   },
   "dependencies": {
     "lodash": "^4.11.0",