fix(Build): Updating the travis build pre-deploy step

.travis.yml

@@ -7,6 +7,10 @@ after_success:
 before_deploy:
   - mvn clean package
   - mvn assembly:single
+  - yes | gem update --system --force
+  - gem install bundler
+  - gem install uri
+  - gem install logger
 deploy:
   provider: releases
   api_key:

src/test/java/com/bullhorn/dataloader/task/ConvertAttachmentTaskTest.java

@@ -1,6 +1,5 @@
 package com.bullhorn.dataloader.task;
 
-import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.mock;