Add test scripts

Author: mattphillips

package.json

@@ -2,6 +2,11 @@
   "name": "deep-object-diff",
   "version": "0.0.1",
   "description": "Deep diffs two objects, including nested structures of arrays and objects, and return the difference.",
+  "scripts": {
+    "test": "mocha \"src/**/*spec.js\" --recursive --compilers js:babel-register",
+    "test:coverage": "babel-node ./node_modules/.bin/babel-istanbul cover _mocha -- \"src/**/*spec.js\" --recursive --compilers js:babel-register",
+    "test:watch": "npm test -- -w"
+  },
   "author": "Matt Phillips",
   "license": "ISC",
   "dependencies": {