[math] Update the logic of array creation fuctions (#7)

* Update _compat_numpy.py

* Update _compat_numpy.py

* Update

* Update _compat_numpy.py

* Fix

* Update brainunit.math.rst

* Update _compat_numpy.py

* Update _unit_test.py

* Restruct

* Update

* Fix bugs

* Fix bugs in Python 3.9

* Update _compat_numpy_funcs_bit_operation.py

* Update _compat_numpy_funcs_bit_operation.py

* Fix logic of `asarray`

* update

* Update array creation funcs

* Update _compat_numpy_test.py

* Add magnitude conversion for `asarray`

* Update _compat_numpy_array_creation.py

* Update _compat_numpy_test.py

* Fix bugs

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Co-authored-by: Chaoming Wang <adaduo@outlook.com>