Update dependency com.google.firebase.crashlytics to v3.0.6

Author: renovate[bot]

gradle/libs.versions.toml

@@ -31,7 +31,7 @@ espresso = "3.6.1"
 firebaseAnalyticsKtx = "22.4.0"
 firebaseCore = "21.1.1"
 firebaseCrashlytics = "19.4.3"
-firebaseCrashlyticsGradle = "3.0.3"
+firebaseCrashlyticsGradle = "3.0.6"
 firebasePerf = "21.0.5"
 firebasePerfGradlePlugin = "1.4.2"
 flexbox = "3.0.0"