[sign_in]: Bump com.google.android.gms:play-services-auth from 20.5.0 to 20.6.0 in /packages/google_sign_in/google_sign_in_android/android (#4359)

Bumps com.google.android.gms:play-services-auth from 20.5.0 to 20.6.0.

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packages/google_sign_in/google_sign_in_android/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 6.1.18
+
+* Updates play-services-auth version to 20.6.0.
+
 ## 6.1.17
 
 * Converts method channels to Pigeon.

packages/google_sign_in/google_sign_in_android/android/build.gradle

@@ -59,7 +59,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.google.android.gms:play-services-auth:20.5.0'
+    implementation 'com.google.android.gms:play-services-auth:20.6.0'
     implementation 'com.google.guava:guava:32.0.1-android'
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.mockito:mockito-inline:5.0.0'

packages/google_sign_in/google_sign_in_android/pubspec.yaml

@@ -2,7 +2,7 @@ name: google_sign_in_android
 description: Android implementation of the google_sign_in plugin.
 repository: https://github.com/flutter/packages/tree/main/packages/google_sign_in/google_sign_in_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+google_sign_in%22
-version: 6.1.17
+version: 6.1.18
 
 environment:
   sdk: ">=2.18.0 <4.0.0"