deps: update Guava to 30.0 (#1645)

Author: elharo

pom.xml

@@ -470,7 +470,7 @@
     <project.jsr305.version>3.0.2</project.jsr305.version>
     <project.gson.version>2.8.6</project.gson.version>
     <project.protobuf-java.version>3.14.0</project.protobuf-java.version>
-    <project.guava.version>29.0-android</project.guava.version>
+    <project.guava.version>30.0-android</project.guava.version>
     <project.appengine.version>1.9.83</project.appengine.version>
     <project.xpp3.version>1.1.4c</project.xpp3.version>
     <project.jdo2-api.version>2.3-eb</project.jdo2-api.version>