Upgrade wiremock to 2.26.2

Change-Id: Ief7e7fdd3bae406c1ade4a52c9c1f95901a89216
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 27acdfe..21270a3 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:2.26.1",
-        sha1 = "7eba948f08ae7ad0c26d5ae63e90dbac945e51b0",
+        artifact = "com.github.tomakehurst:wiremock-standalone:2.26.2",
+        sha1 = "b4082b23cb703b9ac83c1457773ad814eb1dd901",
     )
 
     maven_jar(