BUG: ICON metadata being dropped

[jklenzing]

Describe the bug Many fill vals, mins, max, etc are being dropped.

To Reproduce From github actions:

 UserWarning: Metadata with type <class 'numpy.float32'> does not match expected type (<class 'int'>, <class 'float'>). Dropping input for 'ICON_L23_MIGHTI_B_Thermal_Electric_Cooler_Cold_Temperature' with key 'ValidMin'

Expected behavior A clear and concise description of what you expected to happen.

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• OS: [e.g. iOS]
• Version [e.g. Python 3.7]
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[jklenzing]

TODO: run against pysat develop to make sure that types are properly updated.

[jklenzing]

Updates in pysat 3.1.0 have fixed this issue.