deps: update dependency org.hamcrest:hamcrest to v3 (#1693)

Author: renovate-bot

google-cloud-pubsublite/pom.xml

@@ -138,7 +138,7 @@
     <dependency>
       <groupId>org.hamcrest</groupId>
       <artifactId>hamcrest</artifactId>
-      <version>2.2</version>
+      <version>3.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>