Resolve deprecation warnings from numpy.

[altix]

In stiltstation and geoinfo we use

  lon = np.float(clon[:-1])
  lat = np.float(clat[:-1])
  alt = np.int(loc_ident[-5:])

these calls leads to silent warnings:
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
lon = np.float(clon[:-1])
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
alt = np.int(loc_ident[-5:])

[altix]

I suggest we change to

lon = float(...)
lat = float(...)
alt = int(...)