feat: add grpc-iam-v1 to keep version consistent w proto-iam-v1 (#55)

Author: stephaniewang526

pom.xml

@@ -222,6 +222,11 @@
       </dependency>
 
       <!-- Following test deps are kept to keep them consistent with versions above -->
+      <dependency>
+        <groupId>com.google.api.grpc</groupId>
+        <artifactId>grpc-google-iam-v1</artifactId>
+        <version>${iam.version}</version>
+      </dependency>
       <dependency>
         <groupId>com.google.api</groupId>
         <artifactId>gax-grpc</artifactId>