1.5.2

• Fixed: QjackCtl sometimes saves certain settings as quoted strings and the QjackCtl.conf parsing of jack-select didn't handle that correctly,
• Fixed: newer versions of QjackCtl use 0 as the default value for several settings, but setting these settings actually to zero will prevent proper
  JACK operation. For these setting a value of 0 is now interpreted as meaning "(re-)set to default value".
• Updated copyright year in readme, man page and license.
• Added classifier for Python 3.10 support.
• Reformatted source code with black.