iOS真机测试Safari报错 TypeError: this.device.openURL is not a function

* **Macaca Version**:
2.0.13

* **Macaca Doctor Logs**:
macaca-doctor version: 2.0.4

Node.js checklist:

node env: /usr/local/bin/node
node version: v8.9.3

iOS checklist:

Xcode Command Line Tools is ready, version: 2349.
xcodebuild version: 9.2
iproxy[usbmuxd] is installed at: `/usr/local/bin/iproxy`
ios_webkit_debug_proxy is installed at: `/usr/local/bin/ios_webkit_debug_proxy`
carthage is installed, version: 0.28.0

Android checklist:

JAVA version is `1.8.0_101`
JAVA_HOME is set to `/Library/Java/JavaVirtualMachines/jdk1.8.0_101.jdk/Contents/Home`
ANDROID_HOME is not set
Command Line Tools: gradle is uninstalled

Installed driver list:

ios: 2.0.30

* **Operate System**:
macOS 10.13.3
iphone 6 ios 11.2.5

* **Programming Language**:
node.js

* **脚本**:
``` js
var wd = require('macaca-wd');

var remoteConfig = {
host: 'localhost',
port: 4444
};

var driver = wd.promiseChainRemote(remoteConfig);

describe('Test', function () {

before(function () {
return driver.init({
platformName: 'iOS', // iOS, Android, Desktop
udid: '********',
bundleId: 'com.apple.mobilesafari',
});
});

after(function () {
return driver
.sleep(1000)
.quit();
});

it('url: https://www.baidu.com', async function () {
await driver.get('https://www.baidu.com');
});

});

```

* **问题**:
以上脚本在iOS模拟器运行正常。
但是，使用iOS真机Safari浏览器出现错误。

看到issues中有同样的问题，但是对应修改我没有解决。
ios真机，server报错 #517
请问如何解决。

* **macaca server日志**:

>> responseHandler.js:62:14 [master] pid:10916 TypeError: this.device.openURL is not a function
at IOS.get (/usr/local/lib/node_modules/macaca-ios/lib/macaca-ios.js:492:23)
at IOS.get.next ()
at onFulfilled (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:65:19)
at /usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:54:5
at new Promise ()
at Object.co (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:50:10)
at Object.toPromise (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:118:63)
at next (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:99:29)
at onFulfilled (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:69:7)
at /usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:54:5
at new Promise ()
at Object.co (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:50:10)
at Object.toPromise (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:118:63)
at next (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:99:29)
at onFulfilled (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:69:7)
at /usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:54:5
TypeError: this.device.openURL is not a function
at IOS.get (/usr/local/lib/node_modules/macaca-ios/lib/macaca-ios.js:492:23)
at IOS.get.next ()
at onFulfilled (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:65:19)
at /usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:54:5
at new Promise ()
at Object.co (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:50:10)
at Object.toPromise (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:118:63)
at next (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:99:29)
at onFulfilled (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:69:7)
at /usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:54:5
at new Promise ()
at Object.co (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:50:10)
at Object.toPromise (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:118:63)
at next (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:99:29)
at onFulfilled (/usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:69:7)
at /usr/local/lib/node_modules/macaca-cli/node_modules/co/index.js:54:5

Start at macaca-ios.js:492, where IOS.get calls this.device.openURL, and compare the provided macaca-ios and iOS simulator versus real-device setup. Reproduce with the supplied macaca-wd script on an iPhone running iOS 11.2.5, then verify that driver.get opens the URL without the TypeError.

Written by the indexing model from the issue text.