Update JSCh (see http://www.jcraft.com/jsch/ChangeLog)

This closes #84 pull request at github/apache/ant repo

WHATSNEW

@@ -85,6 +85,10 @@ Other changes:
  * Added jmod and link tasks, to support jmod and jlink tools of JDK 9+.
    Github Pull Request #80
 
+ * Jsch library dependency has now been upgraded to 0.1.55. Jsch is
+   the library behind the sshexec and scp Ant tasks.
+   Github Pull Request #84
+
 Changes from Ant 1.10.4 TO Ant 1.10.5
 =====================================
 

lib/libraries.properties

@@ -57,7 +57,7 @@ junit-platform-launcher.version=1.2.0
 junit-vintage-engine.version=5.2.0
 # Only used for internal tests in Ant project
 junit-jupiter-engine.version=5.2.0
-jsch.version=0.1.54
+jsch.version=0.1.55
 jython.version=2.7.0
 # log4j 1.2.15 requires JMS and a few other Sun jars that are not in the m2 repo
 log4j.version=1.2.14