add errorprone back in (#2224)

Author: tballison

tika-grpc/pom.xml

@@ -161,6 +161,10 @@
       <artifactId>tika-core</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.google.errorprone</groupId>
+      <artifactId>error_prone_annotations</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>