- fixed Excellon parser to detect correctly the units and zeros for Excellon's generated by Eagle 9.3.0

- modified the initial size of the canvas on startup
- modified the build file (make_win.py) to solve the issue with suddenly not accepting the version as Beta

VisPyCanvas.py

@@ -40,7 +40,7 @@ class VisPyCanvas(scene.SceneCanvas):
         right_padding.width_max = 0
 
         view = self.grid_widget.add_view(row=1, col=1, border_color='black', bgcolor='white')
-        view.camera = Camera(aspect=1, rect=(-100,-100,500,500))
+        view.camera = Camera(aspect=1, rect=(-25,-25,150,150))
 
         # Following function was removed from 'prepare_draw()' of 'Grid' class by patch,
         # it is necessary to call manually