cast minimum_value and maximum_value to int

[sujaypatil96]

When we add number values for minimum_value and maximum_value properties, like say 0 and 999, when the linkml model is created the program writes to the linkml file as strings rather than numbers.

[cmungall]

this should be generic behavior - introspect the metamodel and use the appropriate python type

[sierra-moxon]

@sujaypatil96 - is this still a relevant issue?

[sujaypatil96]

@sierra-moxon i've made a note of it. Will update the issue by next week.