deps: update dependency com.google.auth:google-auth-library-bom to v0.19.0 (#44)

Author: renovate-bot

pom.xml

@@ -66,7 +66,7 @@
     <google.core.version>1.91.3</google.core.version>
     <google.api-common.version>1.8.1</google.api-common.version>
     <google.common-protos.version>1.17.0</google.common-protos.version>
-    <google.auth.version>0.18.0</google.auth.version>
+    <google.auth.version>0.19.0</google.auth.version>
     <google.http-client.version>1.34.0</google.http-client.version>
     <gax.version>1.50.1</gax.version>
     <grpc.version>1.25.0</grpc.version>