This commit updates the JCommander version to 1.81. The update also takes into account an issue that was introduced in new versions of the JCommander, namely, https://github.com/cbeust/jcommander/issues/377.
This commit updates the JCommander version to 1.81. The update also takes into account an issue that was introduced in new versions of the JCommander, namely, https://github.com/cbeust/jcommander/issues/377.