Remove deprecated np.int and np.float

[jeanconn]

Description

Update np.int and np.float to just int and float.

Testing

In a test environment based on ska3 flight latest 2022.2 this removes these warnings

kadi-fido> ./make_timeline.py --data-dir $SKA/data/arc3
./make_timeline.py:393: DeprecationWarning: `np.int` is a deprecated alias for the builtin `int`. To silence this warning, use `int` by itself. Doing this will not modify any behavior and is safe. When replacing `np.int`, you may wish to use e.g. `np.int64` or `np.int32` to specify the precision. If you wish to review your current use, check the release note link for additional information.
Deprecated in NumPy 1.20; for more details and guidance: https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations
  z = np.zeros(len(fluence_times), dtype=np.int)
./make_timeline.py:291: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
Deprecated in NumPy 1.20; for more details and guidance: https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations
  bins = np.array(bins, dtype=np.float)
./make_timeline.py:527: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
Deprecated in NumPy 1.20; for more details and guidance: https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations
  z = np.zeros_like(times, dtype=np.float)  # 0 => ACIS
./make_timeline.py:291: DeprecationWarning: `np.float` is a deprecated alias for the builtin `float`. To silence this warning, use `float` by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use `np.float64` here.
Deprecated in NumPy 1.20; for more details and guidance: https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations
  bins = np.array(bins, dtype=np.float)

And the timeline.png and timeline_states.js appear unchanged (but successfully made).