Upgrade wiremock to 2.23.2

Change-Id: I2b7f132e7f64742d08cb37a3d57598e5db4138e2
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 138b1cb..1f65ede 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:2.22.0",
-        sha1 = "2f09e89af3ce7a68dcd4dbdc430e5a0fcf857a84",
+        artifact = "com.github.tomakehurst:wiremock-standalone:2.23.2",
+        sha1 = "4a920d6c04fd2444c7bc94880adc8313f5b31ba3",
     )
 
     maven_jar(