doc(README): mention arguments of onSnapToItem callback

Author: webdevstar

package.json

@@ -22,5 +22,21 @@
     "component"
   ],
   "author": "Archriss",
-  "license": "ISC"
+  "license": "ISC",
+  "devDependencies": {
+    "react-addons-shallow-compare": "latest",
+    "babel-eslint": "^6.1.2",
+    "babel-preset-react-native": "^1.9.0",
+    "eslint": "^3.6.1",
+    "eslint-config-standard": "^5.3.5",
+    "eslint-config-standard-react": "^3.0.0",
+    "eslint-plugin-promise": "^2.0.0",
+    "eslint-plugin-react": "^6.3.0",
+    "eslint-plugin-standard": "^2.0.0"
+  },
+  "peerDependencies": {
+    "react": "*",
+    "react-addons-shallow-compare": "*",
+    "react-native": "*"
+  }
 }