Transition to pyqt6 and matplotlib-base in graphics dependencies

Author: willend

devel/bin/mccode-create-conda-yml

@@ -27,11 +27,11 @@ def create_deplist( cfg ):
     if cfg.is_win:
         deps += ['mslex']
 
-    pyqt_with_version = 'pyqt >=5.10'
+    pyqt_with_version = 'pyqt6'
     if cfg.include_mcgui:
         deps += [pyqt_with_version,'qscintilla2']
     if cfg.include_vis:
-        deps += ['matplotlib',
+        deps += ['matplotlib-base',
                  'tornado >=5',
                  'scipy','pillow','pyqtgraph',
                  pyqt_with_version,