Merge branch 'stable-3.0' into stable-3.1

* stable-3.0:
  Use Gerrit 3.0.7 in Dockerfile
  Use Gerrit 2.16.16 in Dockerfile
  Upgrade wiremock to 2.26.3
  Bump Bazel version to 2.2.0
  Upgrade wiremock to 2.26.2
  Upgrade wiremock to 2.26.1

Change-Id: I879d04921d8d4d180c986ed20ae605addc3eb3be
diff --git a/.bazelversion b/.bazelversion
index 7ec1d6d..ccbccc3 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-2.1.0
+2.2.0
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index b91fb9d..ca33b60 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:2.26.0",
-        sha1 = "c0a192a3fd43b265ff4bc6014d64920d7c6e4174",
+        artifact = "com.github.tomakehurst:wiremock-standalone:2.26.3",
+        sha1 = "245c6efae2cbcb4e4f3457caf3d1c030cbaf2eb5",
     )
 
     maven_jar(