Summary:
Fix 'The domain/default pair of (Info.plist,CFBundleShortVersionString) does not exist' issue
## Changes in this pull request
Issue fixed: #
when run pod install under Examples/Examples-iOS, you may encounter the error:
```
The domain/default pair of (path/to/IGListKit/Source/Info, CFBundleShortVersionString) does not exist.
[!] The `IGListDiffKit` pod failed to validate due to 1 error:
- ERROR | version: A version is required
```
Changed the usage of `defaults read` in scripts/version.sh to `/usr/libexec/PlistBuddy` will fix the problem.
### Checklist
- [x] All tests pass. Demo project builds and runs.
- [x] I added tests, an experiment, or detailed why my change isn't tested.
- [x] I added an entry to the `CHANGELOG.md` for any breaking changes, enhancements, or bug fixes.
- [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/.github/CONTRIBUTING.md)
Pull Request resolved: https://github.com/Instagram/IGListKit/pull/1507
Reviewed By: bdotdub
Differential Revision: D28753682
Pulled By: lorixx
fbshipit-source-id: 44fa4edffac94c48257c2d841321877d0068794a
Summary: This allows us to have a single declaration of the version in the `Info.plist`, and have it automatically synced to the podspec. I'm going to split the podspecs as I did it wrong (#1382) when splitting the libraries, so this avoids having three places where the version is declared.
Reviewed By: iperry90
Differential Revision: D18449842
fbshipit-source-id: 2991180ee14003b8ebe1f4ef601036404315dfd6