deps: update google-auth-java-library to 1.19.0 (#1815)

Author: diegomarquezp

gapic-generator-java-pom-parent/pom.xml

@@ -28,7 +28,7 @@
     <javax.annotation-api.version>1.3.2</javax.annotation-api.version>
     <auto-value.version>1.10.1</auto-value.version>
     <grpc.version>1.55.1</grpc.version>
-    <google.auth.version>1.18.0</google.auth.version>
+    <google.auth.version>1.19.0</google.auth.version>
     <gson.version>2.10.1</gson.version>
     <guava.version>32.0.1-jre</guava.version>
     <!--  On next protobuf upgrade (to 3.23.3 or higher),