chore(deps): bump play-services-base in /ApiDemos/kotlin (googlemaps-samples#241)

Author: dependabot-preview[bot]

ApiDemos/kotlin/app/build.gradle

@@ -60,7 +60,7 @@ dependencies {
 
     v3Implementation name:'maps-sdk-3.0.0-beta', ext:'aar'
     v3Implementation 'com.google.android.gms:play-services-basement:17.3.0'
-    v3Implementation 'com.google.android.gms:play-services-base:17.2.1'
+    v3Implementation 'com.google.android.gms:play-services-base:17.3.0'
     v3Implementation 'com.google.android.gms:play-services-gcm:17.0.0'
     v3Implementation 'com.google.android.gms:play-services-location:17.0.0'