TypeError: undefined is not an object (evaluating 'ecl.ordinal')

[ex-tag]

Getting an error when using a lower-case 'h' for level='h' setting

TypeError: undefined is not an object (evaluating 'ecl.ordinal')

This error is fixed by using an upper-case H, but the inputs should be type-checked.

See this stackoverflow question for reference
https://stackoverflow.com/questions/69042390/typescript-allow-only-uppercase-keys-in-object