Removed global npm dependency

package.json

@@ -1,6 +1,6 @@
 {
   "name": "amplitudejs",
-  "version": "3.0.1",
+  "version": "3.0.2",
   "description": "A JavaScript library that allows you to control the design of your media controls in your webpage -- not the browser. No dependencies (jQuery not required) https://521dimensions.com/open-source/amplitudejs",
   "main": "dist/amplitude.js",
   "devDependencies": {
@@ -18,9 +18,8 @@
       "dist"
   ],
   "scripts": {
-    "preinstall": "npm install -g webpack",
-    "build": "webpack",
-    "test": "echo \\\"Error: no test specified\\\" && exit 1"
+    "build": "node_modules/.bin/webpack",
+    "test": "echo \\\"Tests are not supported yet.... Coming soon!\\\" && exit 0"
   },
   "repository": {
     "type": "git",