Summary:
To ensure consistency of RNTester Podfile.lock:
* introduce a script to run `pod install` on the current commit
* have the script check the exact CocoaPods version to use for consistency
* have version bump script run this automatically to keep it up-to-date with the version change
To validate, have this change in `0.66-stable` branch, then try:
```
./scripts/bump-oss-version.js 0.66.0-rc.5
```
This automatically ran `pod install` which produced the Podfile.lock update.
Changelog: [Internal]
Reviewed By: TheSavior
Differential Revision: D31132867
fbshipit-source-id: 1c82653ca0cfc5471ed2c5091c09648a7acbab90
Kevin Gozali