Update dependency com.google.ads.mediation:facebook to v6.18.0.0 (#215)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -44,7 +44,7 @@ firebase-firestore = { module = "com.google.firebase:firebase-firestore-ktx" }
 firebase-messaging = { module = "com.google.firebase:firebase-messaging-ktx" }
 firebase-config = { module = "com.google.firebase:firebase-config-ktx" }
 google-ads = "com.google.android.gms:play-services-ads:23.3.0"
-google-ads-mediation-meta = "com.google.ads.mediation:facebook:6.17.0.0"
+google-ads-mediation-meta = "com.google.ads.mediation:facebook:6.18.0.0"
 google-auth = "com.google.android.gms:play-services-auth:21.2.0"
 google-billing = "com.android.billingclient:billing-ktx:7.0.0"
 google-play-review = "com.google.android.play:review-ktx:2.0.1"