Build: Modernize the build stack

This eliminated about 80 vulnerabilities from older build tools.

Author: dmethvin

.eslintrc.js

@@ -0,0 +1,17 @@
+module.exports = {
+    // Support: IE11 without transpilation
+    "parserOptions": {
+        "ecmaVersion": 5
+    },
+    // Support: Non-browser envs like jsdom
+    "env": {},
+    "extends": "jquery",
+    "globals": {
+        "window": "readonly",
+        "define": "readonly",
+        "module": "readonly",
+        "jQuery": "readonly"
+    },
+    "rules": {
+    }
+};

.jshintrc

@@ -76,3 +76,12 @@ In your browser-side javascript:
 var $ = require('jquery-browserify');
 require('jquery-mousewheel')($);
 ```
+
+## Building the code in the repo
+
+```sh
+$ git clone git@github.com:jquery/jquery-mousewheel.git
+$ cd jquery-mousewheel/
+$ npm install
+$ npm run build
+```

Gruntfile.js

@@ -7,10 +7,9 @@
     "*.txt",
     ".*",
     "!LICENSE.txt",
-    "Gruntfile.js",
     "test"
   ],
   "dependencies": {
-    "jquery": ">=1.2.2"
+    "jquery": ">=1.7.2"
   }
 }