**Added:**

* Sourcing foreign shells now have the ``--show`` option, which
  lets you see when script will be run, and the ``--dryrun``
  option which prevents the source from actually taking place.
  Xonsh's foriegn shell API also added these keyword arguments.

**Changed:** None

**Deprecated:** None

**Removed:** None

**Fixed:**

* Fixed ``source-zsh`` to work with zsh v5.2.

**Security:** None