Removed useless webpack dependencies and add missing babel-cli one

Author: piranna

package.json

@@ -10,9 +10,8 @@
   ],
   "scripts": {
     "build": "del ./dist && mkdir dist && babel src -d dist --ignore **/__tests__",
-    "build:umd": "webpack --config webpack.config.js --sort-assets-by --progress",
     "lint": "eslint src",
-    "prepublish": "npm run build && npm run build:umd",
+    "prepublish": "npm run build",
     "test": "npm run lint && npm run test:jest",
     "test:jest": "jest",
     "test:watch": "npm run test:jest -- --watch"
@@ -21,6 +20,7 @@
     "react-pull-to-refresh": "github:piranna/react-pull-to-refresh"
   },
   "devDependencies": {
+    "babel-cli": "^6.26.0",
     "babel-core": "^6.26.3",
     "babel-eslint": "^8.2.3",
     "babel-loader": "^7.1.4",
@@ -40,8 +40,7 @@
     "react-dom": "^16.3.2",
     "react-native-web": "^0.6.1",
     "react-test-renderer": "^16.3.2",
-    "url-loader": "^1.0.1",
-    "webpack-cli": "^2.1.3"
+    "url-loader": "^1.0.1"
   },
   "peerDependencies": {
     "react": "~15.4.1",