Use Xcode 11.5.0 and CocoaPods 1.9.1

[hramos]

CocoaPods 1.9.3 is the latest version, as well as the one distributed by Circle CI to macOS machines alongside Xcode 11.6.0.

The upgrade to CocoaPods and Xcode is therefore tightly coupled due to our dependency on Circle for our open source CI.

With the upgrade to Xcode 11.6.0, we also bump our target OS to ensure iOS tests use an iOS Simulator that is part of the image.

Reference:

• Circle CI macOS Xcode 11.6.0 image manifest (new version): https://circle-macos-docs.s3.amazonaws.com/image-manifest/v3299/index.html
• Circle CI macOS Xcode 11.3.1 image manifest (previous version): https://circle-macos-docs.s3.amazonaws.com/image-manifest/v2244/index.html

Source: https://circleci.com/docs/2.0/testing-ios/#supported-xcode-versions

Changelog:
[Internal] Bump Xcode version used for iOS tests.

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D21415049

[pull-bot]

	Messages
📖	📋 Missing Changelog - Can you add a Changelog? To do so, add a "## Changelog" section to your PR description. A changelog entry has the following format: [CATEGORY] [TYPE] - Message. CATEGORY may be: General iOS Android JavaScript Internal (for changes that do not need to be called out in the release notes) TYPE may be: Added, for new features. Changed, for changes in existing functionality. Deprecated, for soon-to-be removed features. Removed, for now removed features. Fixed, for any bug fixes. Security, in case of vulnerabilities. MESSAGE may answer "what and why" on a feature level. Use this to briefly tell React Native users about notable changes.
📖	📋 Missing Test Plan - Can you add a Test Plan? To do so, add a "## Test Plan" section to your PR description. A Test Plan lets us know how these changes were tested.
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Generated by 🚫 dangerJS against 40d8dd0

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	6,760,779	-449,114
android	hermes	armeabi-v7a	6,423,738	-435,319
android	hermes	x86	7,148,430	-496,087
android	hermes	x86_64	7,038,344	-497,125
android	jsc	arm64-v8a	8,932,450	-436,268
android	jsc	armeabi-v7a	8,587,804	-422,214
android	jsc	x86	8,763,223	-468,215
android	jsc	x86_64	9,338,773	-469,817

Base commit: 345baf4

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	n/a	--

Base commit: 345baf4

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D21415049

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D21415049

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D21415049

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D21415049

[react-native-bot]

This pull request was successfully merged by @hramos in 5fdb558.

^{When will my fix make it into a release? | Upcoming Releases}

[alloy]

@hramos Fun stuff, will apply this to our macOS fork too. Any plans to upgrade to a newer Detox, assuming it runs the existing test suite?

[hramos]

Upgrading Detox should be fine, though I don't think someone's working on that at the moment. If I have some extra cycles this week, I may look at upgrading to Xcode 12.

[alloy]

Continued here #30084