Bump guava from 30.1.1-jre to 31.0-jre (GoogleContainerTools#3463)

Bumps [guava](https://github.com/google/guava) from 30.1.1-jre to 31.0-jre.
- [Release notes](https://github.com/google/guava/releases)
- [Commits](https://github.com/google/guava/commits)

---
updated-dependencies:
- dependency-name: com.google.guava:guava
  dependency-type: direct:production
...

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build.gradle

@@ -61,7 +61,7 @@ subprojects {
     GOOGLE_HTTP_CLIENT: 'com.google.http-client:google-http-client:1.34.0',
     GOOGLE_HTTP_CLIENT_APACHE_V2: 'com.google.http-client:google-http-client-apache-v2:1.34.0',
     GOOGLE_AUTH_LIBRARY_OAUTH2_HTTP: 'com.google.auth:google-auth-library-oauth2-http:0.18.0',
-    GUAVA: 'com.google.guava:guava:30.1.1-jre',
+    GUAVA: 'com.google.guava:guava:31.0-jre',
     JSR305: 'com.google.code.findbugs:jsr305:3.0.2', // transitively pulled in by GUAVA
 
     // for Build Plan and Jib Plugins Extension API