[AUTOMATIC] iOS 5.87.0 => 5.87.1 Android 10.19.0 => 10.19.1 (#1849)

[AUTOMATIC] iOS 5.87.0 => 5.87.1 Android 10.19.0 => 10.19.1

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> [!NOTE]
> **Low Risk**
> Patch-only dependency pins with no application logic changes; main
risk is inheriting whatever fixes or regressions exist in the upstream
SDK patch releases.
> 
> **Overview**
> This automatic PR **bumps pinned native RevenueCat SDK versions** so
hybrid-common stays aligned with the latest patch releases—no hybrid
bridge or API code changes.
> 
> **iOS (5.87.0 → 5.87.1):** `RevenueCat` / `RevenueCatUI` are updated
in SwiftPM (`Package.swift`, `Package.resolved`), CocoaPods
(`PurchasesHybridCommon.podspec`, `PurchasesHybridCommonUI.podspec`,
`ios/PurchasesHybridCommon/Podfile`, `Podfile.lock`).
> 
> **Android (10.19.0 → 10.19.1):** the `purchases` version in
`android/gradle/libs.versions.toml` is bumped, which flows to
`purchases`, `purchases-ui`, and related store modules.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
18eaf2644f1e234289d09eb7bc1d36b9c41c630d. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
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