Removing deprecated mockito methods
diff --git a/kerby-kerb/kerb-util/src/test/java/org/apache/kerby/kerberos/kerb/keytab/KeytabEntryTest.java b/kerby-kerb/kerb-util/src/test/java/org/apache/kerby/kerberos/kerb/keytab/KeytabEntryTest.java
index 8366a64..4ced372 100644
--- a/kerby-kerb/kerb-util/src/test/java/org/apache/kerby/kerberos/kerb/keytab/KeytabEntryTest.java
+++ b/kerby-kerb/kerb-util/src/test/java/org/apache/kerby/kerberos/kerb/keytab/KeytabEntryTest.java
@@ -22,9 +22,9 @@
 import org.apache.kerby.kerberos.kerb.type.KerberosTime;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.Matchers;
+import org.mockito.ArgumentMatchers;
 import org.mockito.invocation.InvocationOnMock;
-import org.mockito.runners.MockitoJUnitRunner;
+import org.mockito.junit.MockitoJUnitRunner;
 import org.mockito.stubbing.Answer;
 
 import java.io.ByteArrayInputStream;
@@ -56,7 +56,7 @@
                  }).when(mockKeytabInputStream).available();
         //doReturn(120).when(mockKeytabInputStream).readOctetsCount();
         doReturn(new byte[]{}).when(mockKeytabInputStream).readCountedOctets();
-        doReturn(null).when(mockKeytabInputStream).readPrincipal(Matchers.any(Integer.class));
+        doReturn(null).when(mockKeytabInputStream).readPrincipal(ArgumentMatchers.any(Integer.class));
         doReturn(new KerberosTime()).when(mockKeytabInputStream).readTime();
 
         KeytabEntry keytabEntry = new KeytabEntry();