deps: update dependency com.google.auth:google-auth-library-bom to v1…

….5.3 (googleapis#614)

first-party-dependencies/pom.xml

@@ -63,7 +63,7 @@
     <google.api-common.version>2.1.4</google.api-common.version>
     <google.common-protos.version>2.7.2</google.common-protos.version>
     <google.core.version>2.4.0</google.core.version>
-    <google.auth.version>1.4.0</google.auth.version>
+    <google.auth.version>1.5.3</google.auth.version>
     <google.http-client.version>1.41.2</google.http-client.version>
     <google.oauth-client.version>1.33.1</google.oauth-client.version>
     <google.api-client.version>1.33.1</google.api-client.version>