Build against API version 2.13.1

Change-Id: Icf8dcf80cbc5c55c9d73c182fc239c485835d993

lib/gerrit/BUCK

diff --git a/lib/gerrit/BUCK b/lib/gerrit/BUCK
index 04406f8..42d492c 100644
--- a/lib/gerrit/BUCK
+++ b/lib/gerrit/BUCK
@@ -1,12 +1,12 @@
 include_defs('//bucklets/maven_jar.bucklet')
 
-VER = '2.12.5'
+VER = '2.13.1'
 REPO = MAVEN_CENTRAL
 
 maven_jar(
   name = 'plugin-api',
   id = 'com.google.gerrit:gerrit-plugin-api:' + VER,
-  sha1 = '456b8ed836cdcba672f94f397f09a67bcfbe54a7',
+  sha1 = '8e12346dbb677d70987afdbec5352ff6e889a181',
   license = 'Apache2.0',
   attach_source = False,
   repository = REPO,

pom.xml

diff --git a/pom.xml b/pom.xml
index 5565b6a..a0eb50e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
   <groupId>com.google.gerrit</groupId>
   <artifactId>project-download-commands</artifactId>
   <packaging>jar</packaging>
-  <version>2.12.5</version>
+  <version>2.13.1</version>
   <name>project-download-commands</name>
 
   <properties>