v11 warnings when building Swift Package

[AdamUncao]

Hello team,

Thanks for your hard work on the package.

When building the package on Xcode 15+ build warnings appear. Looks like the package file needs to be updated to match the readme. The readme says the package requires iOS 12+ however, the package file still has iOS 11. The same is the case for tvOS.

warning: 'v11' is deprecated: iOS 12.0 is the oldest supported version
10 |   platforms: [
11 |     .macOS(.v10_13),
12 |     .iOS(.v11),
   |           `- warning: 'v11' is deprecated: iOS 12.0 is the oldest supported version
13 |     .watchOS(.v4),
14 |     .tvOS(.v11)

tvOS 12.0 is the oldest supported version
12 |     .iOS(.v11),
13 |     .watchOS(.v4),
14 |     .tvOS(.v11)
   |            `- warning: 'v11' is deprecated: tvOS 12.0 is the oldest supported version
15 |   ],
16 |   products: [