Update VERSIONS.md

Author: RCGitBot

VERSIONS.md

@@ -1,5 +1,6 @@
 | Version       | iOS version | Android version | Common version | Play Billing Library version | Unity IAP compatibility       |
 | ------------- | ----------- | --------------- | -------------- | ---------------------------- | ----------------------------- |
+| 8.4.19 | [5.57.0](https://github.com/RevenueCat/purchases-ios/releases/tag/5.57.0) | [9.20.0](https://github.com/RevenueCat/purchases-android/releases/tag/9.20.0) | [17.31.0](https://github.com/RevenueCat/purchases-hybrid-common/releases/tag/17.31.0) | [8.0.0](https://developer.android.com/google/play/billing/release-notes) | Unity IAP 5.0.0+ |
 | 8.4.18 | [5.56.0](https://github.com/RevenueCat/purchases-ios/releases/tag/5.56.0) | [9.19.3](https://github.com/RevenueCat/purchases-android/releases/tag/9.19.3) | [17.30.0](https://github.com/RevenueCat/purchases-hybrid-common/releases/tag/17.30.0) | [8.0.0](https://developer.android.com/google/play/billing/release-notes) | Unity IAP 5.0.0+ |
 | 8.4.17 | [5.55.2](https://github.com/RevenueCat/purchases-ios/releases/tag/5.55.2) | [9.19.1](https://github.com/RevenueCat/purchases-android/releases/tag/9.19.1) | [17.28.1](https://github.com/RevenueCat/purchases-hybrid-common/releases/tag/17.28.1) | [8.0.0](https://developer.android.com/google/play/billing/release-notes) | Unity IAP 5.0.0+ |
 | 8.4.16 | [5.54.1](https://github.com/RevenueCat/purchases-ios/releases/tag/5.54.1) | [9.19.0](https://github.com/RevenueCat/purchases-android/releases/tag/9.19.0) | [17.27.1](https://github.com/RevenueCat/purchases-hybrid-common/releases/tag/17.27.1) | [8.0.0](https://developer.android.com/google/play/billing/release-notes) | Unity IAP 5.0.0+ |