Automatically handle CocoaPods being out of date while creating a new project

[grabbou]

When initing a new project and having out-dated CocoaPods repository, React Native init can fail with the following output:

✔ Downloading template
✔ Copying template
✔ Processing template
⠇ Installing CocoaPods dependencies (this may take a few minutes)Analyzing dependencies
Fetching podspec for `Folly` from `../node_modules/react-native/third-party-podspecs/Folly.podspec`
Fetching podspec for `glog` from `../node_modules/react-native/third-party-podspecs/glog.podspec`
[!] CocoaPods could not find compatible versions for pod "FlipperKit":
  In Podfile:
    FlipperKit (~> 0.33.1)

None of your spec sources contain a spec satisfying the dependency: `FlipperKit (~> 0.33.1)`.

You have either:
 * out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.
 * mistyped the name or version.
 * not added the source repo that hosts the Podspec to your Podfile.

✖ Installing CocoaPods dependencies (this may take a few minutes)
error Error: Failed to install CocoaPods dependencies for iOS project, which is required by this template.
Please try again manually: "cd ./RNTestProject/ios && pod install".

We should try/catch this and handle as recommended, that is run pod repo update and repeat.