Supports uniquePackageNames by setting the namespace for the :models module

gradle.properties

@@ -9,3 +9,5 @@ kotlin.code.style=official
 #Android
 android.useAndroidX=true
 android.nonTransitiveRClass=true
+# Enabled to avoid regressions of #185.
+android.uniquePackageNames=true

models/build.gradle.kts

@@ -22,5 +22,5 @@ kotlin {
 }
 
 android {
-    namespace = "com.revenuecat.purchases.kmp"
+    namespace = "com.revenuecat.purchases.kmp.models"
 }