fix: align minimum OS deployment target to 15.6 across the monorepo

[nickolas-dimitrakas]

Background

The SDK has always documented iOS 15.6 and tvOS 15.6 as its minimum supported OS versions — both in the official docs and in all three CocoaPods podspecs (mParticle-Apple-SDK.podspec, mParticle-Apple-SDK-ObjC.podspec, mParticle-Apple-SDK-Swift.podspec). However, the SPM Package.swift manifests across the monorepo used the .v15 enum shorthand, which resolves to iOS/tvOS 15.0 — not 15.6. This meant SPM consumers were advertised a lower floor than CocoaPods consumers and our own documentation.

What Has Changed

• 31 Package.swift files — replaced .iOS(.v15) / .tvOS(.v15) with .iOS("15.6") / .tvOS("15.6") (SPM has no .v15_6 enum case; the string overload is the correct form for patch versions)
• 37 project.pbxproj files — updated IPHONEOS_DEPLOYMENT_TARGET and TVOS_DEPLOYMENT_TARGET from 15.0 / 15.1 to 15.6 in kit example apps, size test apps, and RNExample

Left untouched: rokt-payment-extension Package.swift (out of scope); urbanairship-20 Package.swift (already at .v16, a higher floor); main SDK xcodeproj and Example/ app (already correctly set to 15.6).

Checklist

• Self-review completed
• No new tests needed (no logic change — deployment target alignment only)
• Verified: grep -r '\.v15' --include='Package.swift' . returns only the excluded payment extension
• Verified: grep -rn 'IPHONEOS_DEPLOYMENT_TARGET = 15\.' --include='*.pbxproj' . | grep -v 15.6 returns empty

[cursor]

PR Summary

Low Risk
Build-setting and Package.swift platform metadata only; no SDK logic changes. Slightly narrows supported OS range for SPM consumers previously seeing 15.0.

Overview
This PR raises the declared minimum OS for SPM and Xcode projects from iOS/tvOS 15.0 (and some 15.1 app targets) to 15.6, matching documented and CocoaPods minimums.

Swift Package Manager: Kit manifests and the root Package.swift replace .iOS(.v15) / .tvOS(.v15) with .iOS("15.6") / .tvOS("15.6") because SPM has no patch-level enum for 15.6.

Xcode: Example apps, kit framework projects, size-report test apps, and RNExample update IPHONEOS_DEPLOYMENT_TARGET and TVOS_DEPLOYMENT_TARGET to 15.6 where they were still 15.0 or 15.1.

No runtime or API behavior changes—only build/deployment metadata alignment across the monorepo (with noted exclusions such as rokt-payment-extension and packages already on a higher floor).

^{Reviewed by Cursor Bugbot for commit b28198c. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

📦 SDK Size Impact Report

Measures how much the SDK adds to an app's size (with-SDK minus without-SDK).

Metric	Target Branch	This PR	Change
App Bundle Impact	1.77 MB	1.77 MB	+N/A
Executable Impact	848 bytes	848 bytes	+N/A
XCFramework Size	6.45 MB	6.45 MB	+N/A

➡️ SDK size impact change is minimal.

Raw measurements

Target branch (main):

{"baseline_app_size_kb":84,"baseline_executable_size_bytes":75464,"with_sdk_app_size_kb":1900,"with_sdk_executable_size_bytes":76312,"sdk_impact_kb":1816,"sdk_executable_impact_bytes":848,"xcframework_size_kb":6604}

This PR:

{"baseline_app_size_kb":84,"baseline_executable_size_bytes":75464,"with_sdk_app_size_kb":1900,"with_sdk_executable_size_bytes":76312,"sdk_impact_kb":1816,"sdk_executable_impact_bytes":848,"xcframework_size_kb":6604}