chore: Update to Version 9.0.0

[BrandonStalnaker]

Summary

• Bumps the integration version from 8.11.1 to 9.0.0
• Updates the mParticle-Apple-SDK dependency to ~> 9.0 for both iOS and tvOS platforms in the podspec
• Updates the Swift Package Manager dependency to .upToNextMajor(from: "9.0.0") in Package.swift

Reference Issue (For mParticle employees only. Ignore if you are an outside contributor)

• Closes https://rokt.atlassian.net/browse/SDKE-773

[davidzampier]

@BrandonStalnaker does your team have plans to update the Braze version as well? This kit is restraining Braze to v12 (they are on v14), and they've released an important fix for UISceneDelegate recently https://github.com/braze-inc/braze-swift-sdk/releases/tag/14.0.1.

[nickolas-dimitrakas]

Closing this out as obsolete. Since core 9.x we have moved the Apple kits into the mParticle Apple SDK monorepo and aligned the kit release version with the core SDK version line.

The current core README documents adding kits from version-tracked mirror repositories and shows the Braze 14 kit on the 9.x line, for example pod "mParticle-Braze-14", "~> 9" / the mparticle-apple-integration-braze-14 SPM repo. The core Kits/README.md also documents the new kit model: choose the kit track that matches the partner SDK major (braze-12, braze-13, braze-14) and install from the standalone mirror repo.

Because this PR targets the legacy Appboy kit repo and only bumps it to core 9.0.0, it has been superseded by the monorepo-based Braze kit tracks. For Braze 14.x support specifically, use mparticle-apple-integration-braze-14 / mParticle-Braze-14 on the 9.x SDK line.