Fix type issue from Literal usage in pyglet via type: ignore

Author: pushfoo

arcade/text.py

@@ -213,8 +213,9 @@ def __init__(
             z=z,
             font_name=adjusted_font,
             font_size=font_size,
-            anchor_x=anchor_x,
-            anchor_y=anchor_y,
+            # use type: ignore since cast is slow & pyglet used Literal
+            anchor_x=anchor_x,  # type: ignore
+            anchor_y=anchor_y,  # type: ignore
             color=Color.from_iterable(color),
             width=width,
             align=align,