Issues in 4.1.0

[rgeneaux]

Hi, a few bug reports of the plugin manager in pymdoaq == 4.1.0b0

• parsing error of plugin_manager version, fixed by parse manager version correctly #15

• the "Check updates" button always returns "there is a newer version available !"
  indeed when reading the current plugin_manager version, we execute
  from pymodaq_plugin_manager import __version__ as version
  which ends reading the value in 'data/PluginList.json'
  for me, this value is 0.0.17 regardless of the actual manager version, so the manager always thinks there is a newer version

• The list of available plugins is always empty in 4.1.0b0!
  This is because on line 158 of validate.py, pymodaq_version in specifier returns False for pymodaq_version =Version('4.1.0b0') and specifier = '>=4.0' . But it works with pymodaq_version =Version('4.1.0') ("b0" is the issue).

[seb5g]

I'm looking at it now