Update error-prone

Change-Id: Ie8c4e92ab5ea935432feb8a9f914e706c1119253
diff --git a/pom.xml b/pom.xml
index e46f7ad..b32e8a9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -242,7 +242,7 @@
     </dependencyManagement>
 
     <properties>
-        <errorprone.version>2.2.0</errorprone.version>
+        <errorprone.version>2.3.1</errorprone.version>
         <betachecker.version>1.0</betachecker.version>
     </properties>
 
@@ -289,7 +289,7 @@
                     <dependency>
                       <groupId>org.codehaus.plexus</groupId>
                       <artifactId>plexus-compiler-javac-errorprone</artifactId>
-                      <version>2.8.2</version>
+                      <version>2.8.3</version>
                     </dependency>
                     <dependency>
                       <groupId>com.google.errorprone</groupId>