4527 [in_app_purchase] Deprecated the InAppPurchaseAndroidPlatformAddition.enablePendingPurchases method. (cla: yes, waiting for tree to go green, p: in_app_purchase, platform-android)

4528 [ci] Update labeler for special cases (cla: yes)

4529 [url_launcher] Improve README and example (cla: yes, p: url_launcher)

4530 [flutter_plugin_tools] Check for missing version and CHANGELOG updates (cla: yes)

4531 [flutter_plugin_tools] Check for FlutterTestRunner in FTL tests (cla: yes)