Build with API version 2.10

Change-Id: I18e617fc23ae1a5aa7c49a3480f1897fd9117c9f

pom.xml

diff --git a/pom.xml b/pom.xml
index ba3a084..d288c33 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
   <modelVersion>4.0.0</modelVersion>
   <artifactId>gravatar-avatar-provider</artifactId>
   <groupId>com.googlesource.gerrit.plugins.avatar_providers</groupId>
-  <version>2.9</version>
+  <version>2.10</version>
   <packaging>jar</packaging>
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>