Upgrade wiremock to 2.25.1

Change-Id: Ib4205e4206cd8ec680f6173f473bb50d506fe50e

external_plugin_deps.bzl

diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 1f65ede..fc6118e 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -3,8 +3,8 @@
 def external_plugin_deps():
     maven_jar(
         name = "wiremock",
-        artifact = "com.github.tomakehurst:wiremock-standalone:2.23.2",
-        sha1 = "4a920d6c04fd2444c7bc94880adc8313f5b31ba3",
+        artifact = "com.github.tomakehurst:wiremock-standalone:2.25.1",
+        sha1 = "bf46d41a76c274522a8b88eb5b054edca630b089",
     )
 
     maven_jar(