Carthage Xcode 12.2

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* [x] I've read, understood, and done my best to follow the [*CONTRIBUTING guidelines](https://github.com/jjatie/Charts/blob/master/CONTRIBUTING.md).

## What did you do?
I'm trying to install via Carthage and keep getting an error. Charts is required by SeatGeek and I'm working on a SeatGeek integration.

I'm thinking Charts is either not compatible with my Swift/Xcode version, or it needs to exclude `arm64` architecture.

## What did you expect to happen?
Carthage to build the scheme.

## What happened instead?
I'm getting this error:
```
*** Downloading binary-only framework SeatGeek at "file:///Volumes/VNStorage/Repos/iosSwitchbacks/switchbacks-ios/SeatGeek.json"
*** Downloading binary-only framework FirebaseCrashlyticsBinary at "https://dl.google.com/dl/firebase/ios/carthage/FirebaseCrashlyticsBinary.json"
*** Downloading binary-only framework FirebaseAnalyticsBinary at "https://dl.google.com/dl/firebase/ios/carthage/FirebaseAnalyticsBinary.json"
*** Downloading binary-only framework FirebaseFirestoreBinary at "https://dl.google.com/dl/firebase/ios/carthage/FirebaseFirestoreBinary.json"
*** Downloading binary-only framework DynamiContent at "file:///Volumes/VNStorage/Repos/iosSwitchbacks/switchbacks-ios/DynamiContent.json"
*** Fetching MarkdownKit
*** Fetching braintree-ios-drop-in
*** Downloading binary-only framework Localytics at "https://downloads.localytics.com/SDKs/iOS/Localytics.json"
*** Fetching Charts
*** Downloading binary-only framework VN at "file:///Volumes/VNStorage/Repos/iosSwitchbacks/switchbacks-ios/VN.json"
*** Fetching braintree_ios
*** Downloading binary-only framework CardinalMobile at "https://assets.braintreegateway.com/mobile/ios/carthage-frameworks/cardinal-mobile/CardinalMobile.json"
*** Checking out MarkdownKit at "1.7.0"
*** Checking out braintree_ios at "4.37.0"
*** Checking out Charts at "v4.0.1"
*** Checking out braintree-ios-drop-in at "8.1.4"
*** xcodebuild output can be found in /var/folders/yt/zk5_9dxd08b_4gpddjpl6qx00000gn/T/carthage-xcodebuild.mLIMQt.log
*** Downloading binary-only framework CardinalMobile at "https://assets.braintreegateway.com/mobile/ios/carthage-frameworks/cardinal-mobile/CardinalMobile.json"
*** Downloading braintree-ios-drop-in.framework binary at "8.1.4"
*** Downloading braintree_ios.framework binary at "4.37.0"
*** Downloading binary-only framework DynamiContent at "file:///Volumes/VNStorage/Repos/iosSwitchbacks/switchbacks-ios/DynamiContent.json"
*** Downloading binary-only framework FirebaseAnalyticsBinary at "https://dl.google.com/dl/firebase/ios/carthage/FirebaseAnalyticsBinary.json"
*** Downloading binary-only framework FirebaseCrashlyticsBinary at "https://dl.google.com/dl/firebase/ios/carthage/FirebaseCrashlyticsBinary.json"
*** Downloading binary-only framework FirebaseFirestoreBinary at "https://dl.google.com/dl/firebase/ios/carthage/FirebaseFirestoreBinary.json"
*** Downloading binary-only framework Localytics at "https://downloads.localytics.com/SDKs/iOS/Localytics.json"
*** Downloading binary-only framework SeatGeek at "file:///Volumes/VNStorage/Repos/iosSwitchbacks/switchbacks-ios/SeatGeek.json"
*** Downloading binary-only framework VN at "file:///Volumes/VNStorage/Repos/iosSwitchbacks/switchbacks-ios/VN.json"
*** Building scheme "Charts" in Charts.xcworkspace
Build Failed
Task failed with exit code 1:
/usr/bin/xcrun lipo -create /Users/tj/Library/Caches/org.carthage.CarthageKit/DerivedData/12.2_12B45b/Charts/v4.0.1/Build/Intermediates.noindex/ArchiveIntermediates/Charts/IntermediateBuildFilesPath/UninstalledProducts/iphoneos/Charts.framework/Charts /Users/tj/Library/Caches/org.carthage.CarthageKit/DerivedData/12.2_12B45b/Charts/v4.0.1/Build/Products/Release-iphonesimulator/Charts.framework/Charts -output /Volumes/VNStorage/Repos/iosSwitchbacks/switchbacks-ios/Carthage/Build/iOS/Charts.framework/Charts

This usually indicates that project itself failed to compile. Please check the xcodebuild log for more details: /var/folders/yt/zk5_9dxd08b_4gpddjpl6qx00000gn/T/carthage-xcodebuild.mLIMQt.log
Tommys-MBP:switchbacks-ios tj$

```

## Charts Environment
**Charts version/Branch/Commit Number:** `github "danielgindi/Charts" ~> 3.2.1` (I've also tried just `github "danielgindi/Charts"`, but `~> 3.2.1` is recommended in SeatGeek's docs)
**Xcode version:** 12.2
**Swift version:** 5.3.1
**Platform(s) running Charts:** N/A
**macOS version running Xcode:** 11.2.3