New release: card.io 5.4.1 for iOS

[card.io sdk announce]

Hello from card.io!

We have posted version 5.4.1 of card.io for iOS to github.

From the release notes:

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* Fix issue with CocoaPods Objective-C projects not building correctly

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From 5.4.0:

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* Add methods with card.io specific signatures to avoid name collisions

  ( https://github.com/card-io/card.io-iOS-SDK/issues/201 )

* Add .m so that CocoaPods will generate CardIO modulemap. Thanks to @keith.

  ( https://github.com/card-io/card.io-iOS-SDK/pull/210 )

* Update CardIOViewStream's previewLayer to be CALayer. Thanks to @wisolith.

  ( https://github.com/card-io/card.io-iOS-source/pull/63 )

* Update CardIOVideoStream's delegate to be a UIResponder. Thanks to @reidmain.

  ( https://github.com/card-io/card.io-iOS-source/pull/70 )

* Remove incorrect warning about `suppressScanConfirmation`. Thanks to @kballard.

  ( https://github.com/card-io/card.io-iOS-SDK/issues/217 )

* Fix warnings when building from source

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Thanks!
@cardio