replace np.float with float as it's deprecated since numpy 1.20.0

[hubutui]

cocoapi/lvis/lvis/eval.py

Lines 357 to 358 in 01f805c

	tp_sum = np.cumsum(tps, axis=1).astype(dtype=np.float)
	fp_sum = np.cumsum(fps, axis=1).astype(dtype=np.float)

As descriped at upstream:

np.float was a deprecated alias for the builtin float. To avoid this error in existing code, use float by itself.

see also lvis-dataset/lvis-api#37

[hubutui]

cocoapi/pycocotools/pycocotools/cocoeval.py

Lines 410 to 411 in 01f805c

	tp_sum = np.cumsum(tps, axis=1).astype(dtype=np.float)
	fp_sum = np.cumsum(fps, axis=1).astype(dtype=np.float)

These lines also need updating.