deps: update dependency com.google.cloud:grpc-gcp to v1.1.0 (#1306)

Author: renovate-bot

google-cloud-spanner/pom.xml

@@ -121,7 +121,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>grpc-gcp</artifactId>
-      <version>1.0.0</version>
+      <version>1.1.0</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>