switch pre-commit hook to use pre-commit npm package (#823)

package.json

@@ -36,16 +36,20 @@
     "nomnom": "^1.8.1",
     "object-assign": "^4.1.0",
     "pako": "1.0.4",
+    "pre-commit": "^1.2.2",
     "selenium-webdriver": "^2.48.2",
-    "shared-git-hooks": "^1.2.1",
     "sri-toolbox": "^0.2.0",
     "uglify-js": "~2.7.5"
   },
   "bin": "cli.js",
   "scripts": {
     "test": "make lint test",
+    "lint": "make lint",
     "prepublish": "make NIS= dist"
   },
+  "pre-commit": [
+    "lint"
+  ],
   "dependencies": {
     "match-at": "^0.1.0"
   },