Regenerate sheets client (googleapis#541)

Author: yoshi-automation

clients/1.26.0/google-api-services-sheets/v4/pom.xml

@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-sheets</artifactId>
-  <version>v4-rev20181116-1.26.0</version>
-  <name>Google Sheets API v4-rev20181116-1.26.0</name>
+  <version>v4-rev20190109-1.26.0</version>
+  <name>Google Sheets API v4-rev20190109-1.26.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>