Allow importing libHash to succeed in browser

Alsthough this does not make libHash work in the browser it allows other
modules to require libHash while still being exported to the browser.

packages/lib/hash.js

@@ -4,7 +4,7 @@
  */
 "use strict";
 const crypto = require("crypto");
-const fs = require("fs");
+const fs = require("fs-extra");
 
 
 /**

packages/web_ui/webpack.common.js

@@ -95,6 +95,8 @@ module.exports = (env = {}) => ({
 	resolve: {
 		extensions: [".js", ".json", ".jsx"],
 		fallback: {
+			"crypto": false,
+
 			// Required for winston
 			"util": require.resolve("util/"),
 			"os": require.resolve("os-browserify/browser"),