bump sha.js version to 2.1.1

BTW, 2.1.0 doesnt exist in npm?

http://registry.npmjs.org/sha.js/2.1.0
{"error":"version not found: 2.1.0"}

Author: Daryl Lau

package.json

@@ -15,7 +15,7 @@
     "node": "*"
   },
   "dependencies": {
-    "sha.js": "2.1.0"
+    "sha.js": "2.1.1"
   },
   "devDependencies": {
     "tape": "~2.3.2"