release: Blueprint 5.1.0

[robmaceachern]

https://github.com/square/Blueprint/blob/main/CHANGELOG.md

Post-merge steps:

• Once the PR is merged, fetch changes and tag the release, using the merge commit:

• Publish to CocoaPods:
  Updating spec repo trunk

CocoaPods 1.16.1 is available.
To update use: gem install cocoapods

For more information, see https://blog.cocoapods.org and the CHANGELOG for this version at https://github.com/CocoaPods/CocoaPods/releases/tag/1.16.1

Validating podspec
-> BlueprintUI
-> BlueprintUI (5.1.0)
- ERROR | [iOS] unknown: Encountered an unknown error ([!] /opt/homebrew/bin/git clone https://github.com/square/blueprint.git /var/folders/fb/bfghsm1n7ps8dp0cvv6gppkh0000gn/T/d20241125-84659-6li85w --template= --single-branch --depth 1 --branch 5.1.0

Cloning into '/var/folders/fb/bfghsm1n7ps8dp0cvv6gppkh0000gn/T/d20241125-84659-6li85w'...
warning: Could not find remote branch 5.1.0 to clone.
fatal: Remote branch 5.1.0 not found in upstream origin
) during validation.

[!] The spec did not pass validation, due to 1 error.
Updating spec repo cocoapods
Validating podspec
-> BlueprintUICommonControls
-> BlueprintUICommonControls (5.1.0)
- ERROR | [iOS] unknown: Encountered an unknown error (CocoaPods could not find compatible versions for pod "BlueprintUI":
In Podfile:
BlueprintUICommonControls (from /Users/robmaceachern/Development/Blueprint/BlueprintUICommonControls.podspec) was resolved to 5.1.0, which depends on
BlueprintUI (= 5.1.0)

None of your spec sources contain a spec satisfying the dependency: BlueprintUI (= 5.1.0).

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• out-of-date source repos which you can update with pod repo update or with pod install --repo-update.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.) during validation.

[!] The spec did not pass validation, due to 1 error.