Automated: Update Podfile.lock (#3293)

Summary:
This is an automated PR to update the Podfile.lock.
- Make sure that the Podfile.lock contains latest FlipperKit and Flipper pod versions.
- Also make sure that all the dependencies are updated to the latest one.
- This is auto-generated by [create-pull-request](https://github.com/peter-evans/create-pull-request)

Pull Request resolved: https://github.com/facebook/flipper/pull/3293

Test Plan:
Imported from GitHub, without a `Test Plan:` line.

**Static Docs Preview: flipper**
|[Full Site](https://our.intern.facebook.com/intern/staticdocs/eph/D33614354/V2/flipper/)|

|**Modified Pages**|
|[docs/getting-started/ios-native](https://our.intern.facebook.com/intern/staticdocs/eph/D33614354/V2/flipper/docs/getting-started/ios-native/)|

Reviewed By: lawrencelomax

Differential Revision: D33614354

Pulled By: passy

fbshipit-source-id: 219107eff3089cdb27a26c0ce1a0374a912ed4ac

Flipper.podspec

@@ -3,7 +3,7 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
-flipperkit_version = '0.128.2'
+flipperkit_version = '0.128.4'
 Pod::Spec.new do |spec|
   spec.name = 'Flipper'
   spec.cocoapods_version = '>= 1.10'