Merge pull request #1090 from exonum/dependabot/maven/guava.version-28.1-jre

Bump guava.version from 28.0-jre to 28.1-jre

Author: Ilya Bogdanov

exonum-java-binding/pom.xml

@@ -118,7 +118,7 @@
     <powermock.version>2.0.2</powermock.version>
     <protobuf.version>3.9.1</protobuf.version>
     <mockito-core.version>3.0.0</mockito-core.version>
-    <guava.version>28.0-jre</guava.version>
+    <guava.version>28.1-jre</guava.version>
     <vertx.version>3.8.1</vertx.version>
     <equalsverifier.version>3.1.9</equalsverifier.version>
     <javax-annotation-api.version>1.3.2</javax-annotation-api.version>