deps: update guava (#417)

Author: elharo

pom.xml

@@ -162,7 +162,7 @@
     <protobuf.version>3.15.7</protobuf.version>
     <opencensus.version>0.28.0</opencensus.version>
     <annotations-api.version>1.3.2</annotations-api.version>
-    <guava.version>30.1-android</guava.version><!-- We are currently using the *-android version to support JDK7. -->
+    <guava.version>30.1.1-android</guava.version><!-- We are currently using the *-android version to support JDK7. -->
     <junit.version>4.13.2</junit.version>
     <truth.version>1.1.2</truth.version>
     <easymock.version>3.6</easymock.version>