Upgrade to Lettuce 6.8.1.

Closes #3213

Author: mp911de

pom.xml

@@ -23,7 +23,7 @@
 		<beanutils>1.11.0</beanutils>
 		<xstream>1.4.21</xstream>
 		<pool>2.11.1</pool>
-		<lettuce>6.8.0.RELEASE</lettuce>
+		<lettuce>6.8.1.RELEASE</lettuce>
 		<jedis>6.2.0</jedis>
 		<multithreadedtc>1.01</multithreadedtc>
 		<netty>4.2.3.Final</netty>