deps: update dependency com.google.api.grpc:proto-google-common-proto…

…s to v1.18.0 (#129)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.api.grpc:proto-google-common-protos](https://togithub.com/googleapis/java-iam) | minor | `1.17.0` -> `1.18.0` |

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pom.xml

@@ -64,7 +64,7 @@
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-gameservices-parent</site.installationModule>
     <google.api-common.version>1.9.0</google.api-common.version>
-    <google.common-protos.version>1.17.0</google.common-protos.version>
+    <google.common-protos.version>1.18.0</google.common-protos.version>
     <gax.version>1.56.0</gax.version>
     <grpc.version>1.29.0</grpc.version>
     <protobuf.version>3.11.4</protobuf.version>