Fix import for web

Author: brentvatne

src/index.js

@@ -1,7 +1,7 @@
 // @flow
 import React, { Component } from "react";
 import { View, Platform, findNodeHandle, StyleProp } from "react-native";
-import RNViewShot from "./specs/NativeRNViewShot";
+import RNViewShot from "./RNViewShot";
 import type { ViewStyleProp } from "react-native/Libraries/StyleSheet/StyleSheet";
 import type { LayoutEvent } from "react-native/Libraries/Types/CoreEventTypes";