badly defined bounding box

[markjessell]

Used example code:
test_m2l3.zip

Got this error:
(map2loop-3) mark@DEP66241:~/map2loop-3$ python test_m2l3.py
Traceback (most recent call last):
File "test_m2l3.py", line 15, in
proj = Project(use_australian_state_data="SA",
File "<@beartype(map2loop.project.Project.init) at 0x7f494dd21790>", line 260, in init
File "/home/mark/map2loop-3/map2loop/project.py", line 138, in init
raise TypeError(f"Invalid type for bounding_box {type(bounding_box)}")
TypeError: Invalid type for bounding_box <class 'NoneType'>

[RoyThomsonMonash]

This was a type in the README. bbox should have been bounding_box. This has been fixed.