Update helpers.py is_intersect: manhattan dist

Now is_intersect returns True if difference in any axis (x or y) between players less than width.
Thiat results to issue with double death in case when they pathes are perpendicular and both players start and end points (elementar cells, grid crosses) are valid.
Replacing condition to comparing width with manhattan dist makes this issue fixed.

paperio/local_runner/helpers.py

@@ -197,4 +197,4 @@ def get_random_coordinates():
 def is_intersect(p1, p2, width=WIDTH):
     x1, y1 = p1
     x2, y2 = p2
-    return abs(x1 - x2) < width and abs(y1 - y2) < width
+    return abs(x1 - x2) + abs(y1 - y2) < width