deps: update core dependencies (#254)

Author: renovate-bot

pom.xml

@@ -152,10 +152,10 @@
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-firestore-parent</site.installationModule>
     <project.javadoc.protobufBaseURL>https://googleapis.dev/java/google-api-grpc/latest</project.javadoc.protobufBaseURL>
-    <google.core.version>1.93.5</google.core.version>
+    <google.core.version>1.93.6</google.core.version>
     <google.api-common.version>1.9.2</google.api-common.version>
     <google.common-protos.version>1.18.0</google.common-protos.version>
-    <gax.version>1.56.0</gax.version>
+    <gax.version>1.57.0</gax.version>
     <grpc.version>1.30.0</grpc.version>
     <protobuf.version>3.12.2</protobuf.version>
     <junit.version>4.13</junit.version>