Upgrade mockito to 2.23.0

Change-Id: If7bc2a18ec4241a251cc80a67e0d2bd8459c0df7
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 53fbc09..6ec5c18 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -3,22 +3,31 @@
 def external_plugin_deps():
     maven_jar(
         name = "mockito",
-        artifact = "org.mockito:mockito-core:2.5.0",
-        sha1 = "be28d46a52c7f2563580adeca350145e9ce916f8",
+        artifact = "org.mockito:mockito-core:2.23.0",
+        sha1 = "497ddb32fd5d01f9dbe99a2ec790aeb931dff1b1",
         deps = [
             "@byte_buddy//jar",
+            "@byte_buddy_agent//jar",
             "@objenesis//jar",
         ],
     )
 
+    BYTE_BUDDY_VERSION = "1.9.0"
+
     maven_jar(
         name = "byte_buddy",
-        artifact = "net.bytebuddy:byte-buddy:1.5.12",
-        sha1 = "b1ba1d15f102b36ed43b826488114678d6d413da",
+        artifact = "net.bytebuddy:byte-buddy:" + BYTE_BUDDY_VERSION,
+        sha1 = "8cb0d5baae526c9df46ae17693bbba302640538b",
+    )
+
+    maven_jar(
+        name = "byte_buddy_agent",
+        artifact = "net.bytebuddy:byte-buddy-agent:" + BYTE_BUDDY_VERSION,
+        sha1 = "37b5703b4a6290be3fffc63ae9c6bcaaee0ff856",
     )
 
     maven_jar(
         name = "objenesis",
-        artifact = "org.objenesis:objenesis:2.4",
-        sha1 = "2916b6c96b50c5b3ec4452ed99401db745aabb27",
+        artifact = "org.objenesis:objenesis:2.6",
+        sha1 = "639033469776fd37c08358c6b92a4761feb2af4b",
     )