Avoid numpy 1.20.0rc1 deprecation warning

xsocs/process/shift/shift.py

@@ -201,7 +201,7 @@ class ScanShift(object):
                     else:
                         valid_col = np.full((steps_0 * steps_1,),
                                             True,
-                                            dtype=np.bool)
+                                            dtype=bool)
 
                     if shift_row > 0:
                         valid_row = row_idx < scan_params['motor_1_steps']
@@ -210,7 +210,7 @@ class ScanShift(object):
                     else:
                         valid_row = np.full((steps_0 * steps_1,),
                                             True,
-                                            dtype=np.bool)
+                                            dtype=bool)
 
                     valid_idx = np.where(np.logical_and(valid_row, valid_col))