firebase-versions

 (dart2) $ ./gradlew :app:dependencies | grep -i -e firebase -e services | sort | uniq
               +--- com.google.android.gms:play-services-base:9.0.0
               +--- com.google.android.gms:play-services-basement:9.0.0 (*)
               +--- com.google.firebase:firebase-iid:9.0.0
               \--- com.google.firebase:firebase-common:9.0.0 (*)
               |    +--- com.google.android.gms:play-services-basement:9.0.0 (*)
               |    +--- com.google.firebase:firebase-common:9.0.0 (*)
               |    \--- com.google.android.gms:play-services-tasks:9.0.0 (*)
               |    \--- com.google.firebase:firebase-common:9.0.0 (*)
          +--- com.google.android.gms:play-services-basement:9.0.0
          +--- com.google.firebase:firebase-common:9.0.0
          \--- com.google.firebase:firebase-analytics-impl:9.0.0
          |         \--- com.google.android.gms:play-services-basement:9.0.0 (*)
          |    +--- com.google.android.gms:play-services-basement:9.0.0 (*)
          |    \--- com.google.android.gms:play-services-tasks:9.0.0
     +--- com.google.firebase:firebase-auth:15.+ -> 15.1.0 (*)
     \--- com.google.firebase:firebase-analytics:9.0.0
     \--- com.google.firebase:firebase-auth:15.+ -> 15.1.0 (*)
+--- com.google.firebase:firebase-core:9.0.0 -> 15.0.2
+--- project :firebase_analytics
+--- project :firebase_auth
+--- project :firebase_core
+--- project :firebase_database
+--- project :firebase_messaging
+--- project :firebase_storage
+--- project firebase_analytics (n)
+--- project firebase_core (n)
+--- project firebase_database (n)
+--- project firebase_messaging (n)
+--- project firebase_storage (n)
\--- com.google.firebase:firebase-core:9.0.0
\--- project :firebase_auth
\--- project firebase_auth (n)
google-services plugin could not detect any version for com.google.android.gms or com.google.firebase, default version: 9.0.0 will be used.
please apply google-services plugin at the bottom of the build file.
|              +--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|              +--- com.google.firebase:firebase-analytics:[15.0.1,16.0.0) -> 15.0.2 (*)
|              \--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|              \--- com.google.firebase:firebase-common:[15.0.1,16.0.0) -> 15.0.1 (*)
|         +--- com.google.android.gms:play-services-auth-api-phone:[15.0.1,16.0.0) -> 15.0.1
|         +--- com.google.android.gms:play-services-auth-base:[15.0.1] -> 15.0.1
|         +--- com.google.android.gms:play-services-base:[15.0.1,16.0.0) -> 15.0.1 (*)
|         +--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|         +--- com.google.android.gms:play-services-measurement-base:[15.0.2] -> 15.0.2
|         +--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1 (*)
|         +--- com.google.firebase:firebase-analytics-impl:[15.0.2] -> 15.0.2 (*)
|         +--- com.google.firebase:firebase-analytics:[15.0.1,16.0.0) -> 15.0.2 (*)
|         +--- com.google.firebase:firebase-analytics:[15.0.2] -> 15.0.2 (*)
|         +--- com.google.firebase:firebase-common:[15.0.1,16.0.0) -> 15.0.1 (*)
|         +--- com.google.firebase:firebase-core:[15.0.2,16.0.0) -> 15.0.2 (*)
|         +--- com.google.firebase:firebase-database-collection:[15.0.1,16.0.0) -> 15.0.1
|         +--- com.google.firebase:firebase-iid:[15.1.0] -> 15.1.0 (*)
|         \--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1 (*)
|         \--- com.google.firebase:firebase-database-connection:[15.0.1] -> 15.0.1
|         \--- com.google.firebase:firebase-measurement-connector:[15.0.0,16.0.0) -> 15.0.0
|         \--- com.google.firebase:firebase-measurement-connector:[15.0.0,16.0.0) -> 15.0.0 (*)
|         \--- com.google.firebase:firebase-storage-common:[15.0.2] -> 15.0.2
|         |    +--- com.google.android.gms:play-services-base:[15.0.1,16.0.0) -> 15.0.1 (*)
|         |    +--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|         |    \--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|         |    \--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1 (*)
|    +--- com.google.android.gms:play-services-auth:15.+ -> 15.0.1
|    +--- com.google.firebase:firebase-analytics:[15.0.2,16.0.0) -> 15.0.2
|    +--- com.google.firebase:firebase-auth:15.+ -> 15.1.0
|    +--- com.google.firebase:firebase-auth:15.+ -> 15.1.0 (*)
|    \--- com.google.android.gms:play-services-auth:15.+ -> 15.0.1
|    \--- com.google.firebase:firebase-analytics:15.+ -> 15.0.2 (*)
|    \--- com.google.firebase:firebase-auth:15.+ -> 15.1.0 (*)
|    \--- com.google.firebase:firebase-core:15.+ -> 15.0.2 (*)
|    \--- com.google.firebase:firebase-database:15.+ -> 15.0.1
|    \--- com.google.firebase:firebase-measurement-connector-impl:[15.0.0,16.0.0) -> 15.0.0
|    \--- com.google.firebase:firebase-messaging:15.+ -> 15.0.2
|    \--- com.google.firebase:firebase-storage:15.+ -> 15.0.2
|    |    +--- com.google.android.gms:play-services-auth-api-phone:[15.0.1,16.0.0) -> 15.0.1
|    |    +--- com.google.android.gms:play-services-auth-base:[15.0.1] -> 15.0.1
|    |    +--- com.google.android.gms:play-services-base:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    +--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1
|    |    +--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    +--- com.google.android.gms:play-services-flags:[15.0.1,16.0.0) -> 15.0.1
|    |    +--- com.google.android.gms:play-services-measurement-base:[15.0.2] -> 15.0.2
|    |    +--- com.google.android.gms:play-services-stats:[15.0.1,16.0.0) -> 15.0.1
|    |    +--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    +--- com.google.firebase:firebase-analytics-impl:[15.0.2] -> 15.0.2
|    |    +--- com.google.firebase:firebase-analytics:[15.0.1,16.0.0) -> 15.0.2 (*)
|    |    +--- com.google.firebase:firebase-auth-interop:[15.0.2,16.0.0) -> 15.0.2
|    |    \--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    \--- com.google.firebase:firebase-common:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |              +--- com.google.android.gms:play-services-base:[15.0.1,16.0.0) -> 15.0.1
|    |    |              \--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |              |    +--- com.google.android.gms:play-services-basement:[15.0.1] -> 15.0.1 (*)
|    |    |              |    \--- com.google.android.gms:play-services-tasks:[15.0.1] -> 15.0.1 (*)
|    |    |         +--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |         +--- com.google.android.gms:play-services-stats:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |         +--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |         +--- com.google.firebase:firebase-common:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |         \--- com.google.firebase:firebase-iid-interop:[15.0.0,16.0.0) -> 15.0.0
|    |    |    +--- com.google.android.gms:play-services-ads-identifier:[15.0.1,16.0.0) -> 15.0.1
|    |    |    +--- com.google.android.gms:play-services-base:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |    +--- com.google.android.gms:play-services-base:[15.0.1] -> 15.0.1 (*)
|    |    |    +--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |    +--- com.google.android.gms:play-services-measurement-base:[15.0.2] -> 15.0.2
|    |    |    +--- com.google.android.gms:play-services-stats:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |    +--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1
|    |    |    +--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |    +--- com.google.firebase:firebase-common:[15.0.1,16.0.0) -> 15.0.1
|    |    |    \--- com.google.android.gms:play-services-basement:[15.0.1] -> 15.0.1 (*)
|    |    |    \--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |    \--- com.google.firebase:firebase-common:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |    \--- com.google.firebase:firebase-iid:[15.1.0,16.0.0) -> 15.1.0
|    |    |    |    +--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |    |    \--- com.google.android.gms:play-services-basement:[15.0.1,16.0.0) -> 15.0.1 (*)
|    |    |    |    \--- com.google.android.gms:play-services-basement:[15.0.1] -> 15.0.1 (*)
|    |    |    |    \--- com.google.android.gms:play-services-tasks:[15.0.1,16.0.0) -> 15.0.1 (*)