fix: xcode 10.2 compatibility for run-ios command

parse output of simulator list provided by xcode 10.2

In Xcode 10.2, the output of `xcrun simctl list --json devices`
has changed to include a namespace within each version group.
This commit makes a backwards-compatible adjustment to account
for this change in format.

To illustrate:

Before
======

```
{
  "devices": {
    "iOS 10.0": [
      ...
    ]
  }
}
```

After
=====

```
{
  "devices": {
    "com.apple.CoreSimulator.SimRuntime.iOS-10-0": [
      ...
    ]
  }
}
```

packages/cli/src/runIOS/findMatchingSimulator.js

@@ -39,7 +39,14 @@ function findMatchingSimulator(simulators, simulatorString) {
   }
 
   let match;
-  for (const version in devices) {
+  for (const versionDescriptor in devices) {
+    let version = versionDescriptor;
+
+    if ((/^com\.apple\.CoreSimulator\.SimRuntime\./g).test(version)) {
+      // Transform "com.apple.CoreSimulator.SimRuntime.iOS-12-2" into "iOS 12.2"
+      version = version.replace(/^com\.apple\.CoreSimulator\.SimRuntime\.([^-]+)-([^-]+)-([^-]+)$/g, '$1 $2.$3');
+    }
+
     // Making sure the version of the simulator is an iOS or tvOS (Removes Apple Watch, etc)
     if (!version.startsWith('iOS') && !version.startsWith('tvOS')) {
       continue;