Uncaught exception: +[XCAXClient_iOS sharedClient]: unrecognized selector sent to class

EarlGrey run error in XCode10.2:
```
Uncaught exception: +[XCAXClient_iOS sharedClient]: unrecognized selector sent to class
```
I have found the newest code has fixed the error:
```
id XCAXClient;
if ([XCAXClientClass respondsToSelector:NSSelectorFromString(@"sharedClient")]) {
XCAXClient = [XCAXClientClass sharedClient];
} else {
XCAXClient = [[XCUIDevice sharedDevice] accessibilityInterface];
}
```
but I can't get the newest version by :
```
pod 'EarlGrey', '~> 1.15.0'
```
or
```
pod 'EarlGrey'
```
how can I get the newest version?

Start by comparing the EarlGrey code containing the XCAXClient_iOS sharedClient check with the versions available through the shown CocoaPods declarations. Verify which released version includes the fix and whether the requested pod dependency resolves to it; done means the fixed version can be obtained through CocoaPods without the reported exception.

Written by the indexing model from the issue text.