fix typo escapeHtml -> escape-html

lib/insecure-server.js

@@ -40,7 +40,7 @@ module.exports.create = function (securePort, insecurePort, redirects) {
       );
     });
 
-    var escapeHtml = require('escapeHtml');
+    var escapeHtml = require('escape-html');
     var newLocation = 'https://'
       + host.replace(/:\d+/, ':' + securePort) + url
       ;