Charts Pod not working with Xcode 9.3 (Swift 4.1)

[jamiedaniel]

What did you do?

ℹ Updated to the new version of Xcode which is Xcode 9.3. Added Charts to the Podfile, installed pods and attempted to build the project.

What did you expect to happen?

ℹ I expected to build the project successfully.

What happened instead?

ℹ When the project is built an error is displayed: Charts compiled with older version of Swift language (4.0) than previous files (unknown ABI version 0x06)

Charts Environment

Charts version/Branch/Commit Number: 3.1.0
Cocoapods version: 1.5
Xcode version: 9.3
Swift version: 4.1
Platform(s) running Charts: iOS 11.3

Demo Project

ℹ Any new project in Xcode behaves like this.

[jamiedaniel]

Update the CocoaPod spec

[jjatie]

Update pod to 3.1.1 for Swift 4.1 compatibility.