Fail to build apps compiling for Android SDK 31

[Lohan Bodevan]

Describe the bug
If we include RateMyApp in project which is compiling Android SDK 31 (compileSdkVersion 31) the build fails with the error below:

* What went wrong:
Execution failed for task ':rate_my_app:verifyReleaseResources'.
> A failure occurred while executing com.android.build.gradle.tasks.VerifyLibraryResourcesTask$Action
   > Android resource linking failed
     ERROR:/Users/xxxx/.gradle/caches/transforms-3/d647e4cf153df5c584ca88f6d0c0ffec/transformed/core-1.7.0/res/values/values.xml:105:5-114:25: AAPT: error: resource android:attr/lStar not found.

To Reproduce
Steps to reproduce the behavior:

1. Add latest RateMyApp as dependency of project using compileSdkVersion 31 on android/build.gradle
2. Run flutter build apk

Expected behavior
Build completes successfully