Update to Mockito 4

Import of `org.mockito.Matchers` needed to be changed to
`org.mockito.ArgumentMatchers`. `Matchers` was already only an alias
for `ArgumentMatchers` before as described in the release notes:
https://github.com/mockito/mockito/releases/tag/v4.0.0

`any()` is the replacement for `anyObject()`:
mockito/mockito#1931

Signed-off-by: Florian Hockmann <fh@florian-hockmann.de>

janusgraph-es/src/test/java/org/janusgraph/diskstorage/es/rest/RestClientSetupTest.java

@@ -63,7 +63,6 @@
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.anyBoolean;
 import static org.mockito.Mockito.anyInt;
-import static org.mockito.Mockito.anyObject;
 import static org.mockito.Mockito.anyString;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.eq;
@@ -306,7 +305,7 @@ private CredentialsProvider basicAuthTestBase(final Map<String, String> extraCon
                 );
 
         final HttpAsyncClientBuilder hacb = mock(HttpAsyncClientBuilder.class);
-        doReturn(hacb).when(hacb).setDefaultCredentialsProvider(anyObject());
+        doReturn(hacb).when(hacb).setDefaultCredentialsProvider(any());
         hccc.customizeHttpClient(hacb);
 
         final ArgumentCaptor<BasicCredentialsProvider> cpCaptor = ArgumentCaptor.forClass(BasicCredentialsProvider.class);

janusgraph-inmemory/src/test/java/org/janusgraph/diskstorage/inmemory/InMemoryColumnValueStoreTest.java

@@ -39,7 +39,7 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
-import static org.mockito.Matchers.eq;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 

pom.xml

@@ -59,7 +59,7 @@
         <tinkerpop.version>3.5.3</tinkerpop.version>
         <junit-platform.version>1.8.2</junit-platform.version>
         <junit.version>5.8.2</junit.version>
-        <mockito.version>3.12.4</mockito.version>
+        <mockito.version>4.6.1</mockito.version>
         <jamm.version>0.3.0</jamm.version>
         <metrics.version>4.1.18</metrics.version>
         <slf4j.version>1.7.35</slf4j.version>