Update Proguard Rules (#99)

README.md

@@ -489,6 +489,13 @@ Strip Linked Product: Yes
 Strip Debug Symbols During Copy : Yes
 ```
 
+### Known Issues
+
+**Crash reports may not be sent when ProGuard rules are not properly configured for New Relic in hybrid Android applications.**
+
+**Solution**:
+Ensure proper ProGuard rules are added to your ProGuard configuration file. See ["Configuring ProGuard Rules"](https://docs.newrelic.com/docs/mobile-monitoring/new-relic-mobile-android/install-configure/configure-proguard-or-dexguard-android-apps/) in setup documentation.
+
 # Contributing Code
 
 We welcome code contributions (in the form of pull requests) from our user community. Before submitting a pull request please review [these guidelines](CONTRIBUTING.md).