Firebase の BOM が理解できるまではあると便利なのかな？

classpath 'com.google.gms:google-services:4.3.3'との組み合わせ

Artifacts released on maven.google.com (出典:Google)

• com.google.android.datatransport:transport-api:2.0.0
• com.google.android.datatransport:transport-backend-cct:2.0.0
• com.google.android.datatransport:transport-runtime:2.0.0
• com.google.android.gms:play-services-ads:18.0.0
• com.google.android.gms:play-services-ads-identifier:17.0.0
• com.google.android.gms:play-services-ads-lite:18.0.0
• com.google.android.gms:play-services-afs-native:17.0.0
• com.google.android.gms:play-services-analytics:17.0.0
• com.google.android.gms:play-services-analytics-impl:17.0.0
• com.google.android.gms:play-services-appinvite:18.0.0
• com.google.android.gms:play-services-audience:17.0.0
• com.google.android.gms:play-services-auth:17.0.0
• com.google.android.gms:play-services-auth-api-phone:17.0.0
• com.google.android.gms:play-services-awareness:17.0.0
• com.google.android.gms:play-services-base:17.0.0
• com.google.android.gms:play-services-basement:17.0.0
• com.google.android.gms:play-services-cast:17.0.0
• com.google.android.gms:play-services-cast-framework:17.0.0
• com.google.android.gms:play-services-clearcut:17.0.0
• com.google.android.gms:play-services-cronet:17.0.0
• com.google.android.gms:play-services-drive:17.0.0
• com.google.android.gms:play-services-fido:18.0.0
• com.google.android.gms:play-services-fitness:17.0.0
• com.google.android.gms:play-services-flags:17.0.0
• com.google.android.gms:play-services-games:18.0.0
• com.google.android.gms:play-services-gass:18.0.0
• com.google.android.gms:play-services-gcm:17.0.0
• com.google.android.gms:play-services-identity:17.0.0
• com.google.android.gms:play-services-iid:17.0.0
• com.google.android.gms:play-services-instantapps:17.0.0
• com.google.android.gms:play-services-location:17.0.0
• com.google.android.gms:play-services-maps:17.0.0
• com.google.android.gms:play-services-measurement:17.0.0
• com.google.android.gms:play-services-measurement-api:17.0.0
• com.google.android.gms:play-services-measurement-impl:17.0.0
• com.google.android.gms:play-services-measurement-sdk:17.0.0
• com.google.android.gms:play-services-measurement-sdk-api:17.0.0
• com.google.android.gms:play-services-nearby:17.0.0
• com.google.android.gms:play-services-oss-licenses:17.0.0
• com.google.android.gms:play-services-panorama:17.0.0
• com.google.android.gms:play-services-phenotype:17.0.0
• com.google.android.gms:play-services-places:17.0.0
• com.google.android.gms:play-services-places-placereport:17.0.0
• com.google.android.gms:play-services-plus:17.0.0
• com.google.android.gms:play-services-safetynet:17.0.0
• com.google.android.gms:play-services-stats:17.0.0
• com.google.android.gms:play-services-tagmanager:17.0.0
• com.google.android.gms:play-services-tagmanager-api:17.0.0
• com.google.android.gms:play-services-tagmanager-v4-impl:17.0.0
• com.google.android.gms:play-services-tasks:17.0.0
• com.google.android.gms:play-services-vision:18.0.0
• com.google.android.gms:play-services-vision-common:18.0.0
• com.google.android.gms:play-services-vision-image-label:18.0.0
• com.google.android.gms:play-services-wallet:17.0.0
• com.google.android.gms:play-services-wearable:17.0.0
• com.google.firebase:firebase-abt:18.0.0
• com.google.firebase:firebase-ads:18.0.0
• com.google.firebase:firebase-ads-lite:18.0.0
• com.google.firebase:firebase-analytics:17.0.0
• com.google.firebase:firebase-appindexing:19.0.0
• com.google.firebase:firebase-auth:19.1.0
• com.google.firebase:firebase-auth-interop:18.0.0
• com.google.firebase:firebase-common:18.0.0
• com.google.firebase:firebase-common-ktx:18.0.0
• com.google.firebase:firebase-config:18.0.0
• com.google.firebase:firebase-core:17.0.0
• com.google.firebase:firebase-database:19.1.0
• com.google.firebase:firebase-database-collection:17.0.0
• com.google.firebase:firebase-datatransport:17.0.0
• com.google.firebase:firebase-dynamic-links:18.0.0
• com.google.firebase:firebase-firestore:20.0.0
• com.google.firebase:firebase-firestore-ktx:20.0.0
• com.google.firebase:firebase-functions:18.0.0
• com.google.firebase:firebase-iid:19.0.0
• com.google.firebase:firebase-iid-interop:17.0.0
• com.google.firebase:firebase-inappmessaging:18.0.0
• com.google.firebase:firebase-inappmessaging-display:18.0.0
• com.google.firebase:firebase-measurement-connector:18.0.0
• com.google.firebase:firebase-messaging:19.0.0
• com.google.firebase:firebase-ml-common:20.0.0
• com.google.firebase:firebase-ml-model-interpreter:20.0.0
• com.google.firebase:firebase-ml-natural-language:20.0.0
• com.google.firebase:firebase-ml-natural-language-language-id-model:20.0.0
• com.google.firebase:firebase-ml-natural-language-smart-reply:18.0.0
• com.google.firebase:firebase-ml-natural-language-smart-reply-model:20.0.0
• com.google.firebase:firebase-ml-natural-language-translate:20.0.0
• com.google.firebase:firebase-ml-natural-language-translate-model:20.0.0
• com.google.firebase:firebase-ml-vision:21.0.0
• com.google.firebase:firebase-ml-vision-automl:17.0.0
• com.google.firebase:firebase-ml-vision-face-model:18.0.0
• com.google.firebase:firebase-ml-vision-image-label-model:18.0.0
• com.google.firebase:firebase-ml-vision-object-detection-model:17.0.0
• com.google.firebase:firebase-perf:18.0.0
• com.google.firebase:firebase-storage:18.0.0
• com.google.firebase:firebase-storage-common:17.0.0
• com.google.firebase:protolite-well-known-types:17.0.0
• com.google.firebase:firebase-bom:20.0.0