v1.6.0

• Add support for tcsh (#155)
• Fix handling of unquoted completions containing $ (#154)
• Don't insert unnecessary leading quote char in completions (#152)
• Fix parser reuse with positional arguments (#149)
• Tests: Add simple pexpect tests for bash (#153); Add test case to
  verify #20 is fixed (#148)
• Thanks to @davvid and @evanunderscore for their work on this
  release.

v1.5.1

• Packaging fix

v1.5.0

• Do not suggest options from mutually exclusive groups (#145).